Imagine living in a glass house. Every look, every word, every mood swing of another person penetrates you unfiltered. There are no walls, no doors that you can close if it gets too much for you. This is the emotional reality of many people with borderline personality disorder (BPS). And for the relatives? They often stand in front of this glass house and are afraid to move – worried that the glass might shatter.
Boundaries are often negative in relationships where BPS plays a role. It is equated with rejection, punishment or deprivation of love. The opposite is true: Boundaries are the place where we can meet without merging.
This guide is not a ‘benimm-guide’. It is a technical guide to restore system stability – for both sides. He explains the psychological mechanics, provides code for communication and emergency logs for the system crash.
1. The system analysis: Why borders are missing and why this is dangerous
To set boundaries, we need to understand why they often don't exist. A system without a firewall is vulnerable to any attack.
People with Borderline (BPS)
In BPS’s world of experience, the ‘me’ is often fragmented. If you do not feel exactly where you yourself stop and the other begins, demarcation is experienced as an existential threat.
- The wish to merge: There is a deep longing for total symbiosis (‘We against the rest of the world’). A boundary is felt here as a rift in this symbiosis.
- Emotional contagion: Feelings of others are not only perceived, but taken over. If the partner is stressed, panic breaks out in the affected person. The system does not have a spam filter.
- Fear of leaving: A "no" to a request is often translated as "I don't want you anymore". The amygdala (the alarm centre in the brain) immediately fires ‘danger of life’.
For relatives (co-dependency)
Relatives often develop a mechanism called ‘walking on egg shells’.
- The over-responsibility: ‘If I say no now, he/she will freak out or hurt himself/herself.’ The relative takes responsibility for the partner’s emotional regulation.
- The loss of one's own self: In order to avoid conflicts, the relative gives up his own needs, hobbies and opinions.
The result: A toxic loop. The BPS sufferer feels the partner’s insecurity and tests the boundaries harder and harder to find ‘true hold’ (like shaking a fence to see if it holds). If the fence (the partner) gives way, there is no security, but panic.
2. The re-frame: Redefining boundaries
We need to get the term ‘border’ out of the filthy corner of punishment.
Note: There is no limit to controlling each other's behavior. It is there to protect your own well-being.
Technical analogy:
A border is not a wall that blocks traffic. It's a protocol. It defines:
- Which data packets (emotions/actions) do I let in?
- When is my bandwidth exhausted?
- What happens in the event of a security breach (border breach)?
When you set boundaries, you don't say: “You are wrong.”
You say: ‘Here I am, and there you are. And to be there for you, I need to make sure I don't overflow.”
3. Practice module: The Three Types of Boundaries
Not all boundaries are the same. We distinguish three categories to provide clarity.
A. Permeable limits (soft limits)
- Description: You constantly adapt, says Yes, even though you mean No.
- Example: The partner calls at 2 a.m. to talk about everyday worries. You answer even though you have to get out at 6 o'clock.
- Follow-up: Burnout, resignation, hidden anger.
B. Rigid limits (hard limits / walls)
- Description: You close completely, break off contact, block emotionally to protect yourself.
- Example: After a dispute, Silent Treatment or immediate blocking on WhatsApp.
- Follow-up: Isolation, confirmation of abandonment fears at the BPS partner.
C. Healthy limits (smart limits)
- Description: Flexible but stable. Clearly communicated. Appreciative.
- Example: “I hear you're feeling bad and I want to be there for you. I need my sleep for work. Let's have a quiet call tomorrow at 6 p.m.”
- Follow-up: Security, predictability, trust.
4. The ‘how’ – communication techniques for the ‘red zone’
Setting boundaries when everything is quiet is easy. But how to do it in high stress (tension > 70%)? Clear scripts help here.
Technique 1: SET communication (Support, Empathy, Truth)
This method is the gold standard in dealing with borderline.
- Support: An "I" statement of affection.
- “I love you and you are important to me.”
- Empathy (empathy): validation the feeling of the other.
- “I see how much this is hurting you and making you angry right now.”
- Truth (truth/reality): The border or the facts.
- “But I can't let you yell at me. I will end the conversation now and come back in an hour.”
Technique 2: The ‘Stop button’ (for BPS sufferers)
If you, as an affected person, notice that you are pushing the boundaries of others (e.g. by sending 50 messages in 10 minutes):
- The reality check: Ask yourself: ‘Is this an emergency (life in danger) or a emotional emergency?’
- The 20-minute rule: The brain takes about 20 minutes to break down stress hormones to such an extent that clear thinking is possible.
- Skill: Mobile phone in flight mode. Take ice cubes in your hand (pain stimulus for regulation).
5. Specific scenarios: Examples from everyday life
Let's translate the abstract into practice. Here are three classic ‘traps’ and how to solve them.
Scenario 1: The emotional tsunami (outbursts of anger)
Situation: You're coming home. Your partner (in BPS mode) has a bad day and immediately discharges his anger over the uncluttered hallway at you, becoming insulting.
- Wrong (justification): "But I only got … yesterday" (leads to escalation).
- Wrong (counterattack): ‘You are hysterical!’ (leads to the explosion).
- Correct (set the limit):
- Posture calm, but upright. Keep eye contact, do not sting aggressively.
- Statement: “I notice that you are extremely charged (empathy). But I will not be offended (limit). I'm going to the study now. If we can talk quietly again, I will be happy to be there for you (support).”
- IMPORTANT: The consequence must follow. You really have to leave the room.
Scenario 2: The endless need (co-dependency)
Situation: The partner requires constant confirmation via WhatsApp during working hours. “Do you still love me? Why don’t you write?’
- Wrong: Secretly answer under the table, even though the boss is watching (reinforces the behavior).
- Correct (preventive limit):
- Discuss in a quiet moment: “Look, at work, my phone is a tool, not a communicator for us. I can't answer there. It has nothing to do with you, it has to do with my job. We always write in the lunch break and then again to the end of the day. That is our rhythm.”
- In case of non-compliance: Do not react. Only reply at the agreed time. Consistency is more important than content.
Scenario 3: Suicidal threats as a means of pressure
This is the most difficult scenario.
Situation: ‘If you're going to hang up now, I'll do something to myself.’
- Analysis: This is emotional blackmail, often out of sheer despair, not viciousness. Nevertheless, it may be never Respond with yielding.
- The border:
- “I take your threat very seriously. But I can't be your therapist. If you say you're doing something to yourself, I have no choice: I have to call the ambulance/police because I want to protect you.”
- Action: If the threat persists -> dial 112.
- Why? If the partner stays, the BPS brain learns: ‘Suicide threat = partner remains = safety’. This is life-threatening conditioning. The call to the ambulance breaks this circle.
6. Sandbox exercises (training environment)
Boundaries need to be trained, like a muscle or code that you test in a sandbox before it goes live.
Exercise A: ‘No’ without ‘Because’
Many people (especially relatives) believe that they have to justify every ‘no’.
- Task: Say "no" to small things three times this week without giving a reason.
- Example: ‘Do you still want coffee?’ – ‘No, thank you.’ (Not: “No, otherwise I can't sleep.”)
- Learning effect: You have the right to your limits without having to play lawyer.
Exercise B: The ‘body scan’ (for those affected)
Crossing the border is often only felt physically before the head notices it.
- Task: Pay attention to signals: Does the stomach contract? Are your hands getting cold? Do you bite your teeth together?
- Action: As soon as the body reacts -> Time-out. Say: “I just realize I need a 5 minute break.” Leave the room. Breathe.
Exercise C: The value list (Together)
Sit down together (when things are going well!) and write a ‘constitution’ for your relationship.
- What are our absolute no-gos? (e.g. insults, violence, days of silence).
- What are our consequences?
- Keeping this in writing gives the BPS brain security. It is not arbitrary, it is the ‘law’.
7. The neurobiological perspective: Why it hurts (and why it still heals)
Why do borderline sufferers feel like physical pain?
Studies show that social rejection in the brain activates the same areas as physical pain (the anterior cingulate cortex). With BPS, this area is hyperactive.
If you, as a relative, set a limit, you trigger real ‘pain’ in your partner. Knowing this will help you stay empathetic, but tough on the matter.
But: The brain is neuroplastic.
When boundaries are set consistently and reliably (without anger, but calmly), the BPS brain learns over time: ‘Aha. He says no, but he'll be back tomorrow. I shall not die.’
This is the path to healing. Consistency creates new neural pathways. Chaotic yielding reinforces the old paths of fear.
8. Deep Dive: The Emergency Skills (When the System Overheats)
We talked about communication above. But what do you do technologically Exactly when the tension is at 90/100 and the language center (the prefrontal cortex) is already going offline? Talking doesn't work anymore. Now only “hardware reset” helps.
Here are three high-impactSkills from the DBT (dialectical behavioral therapy), explained in detail:
A. The ‘submersible reflex’ (skill: temperature)
This is the fastest way to activate the parasympathetic nervous system (the brake in the body).
- The theory: All mammals have a diving reflex. When ice-cold water touches the face (especially the area around the nose and eyes), the brain signals: “We are underwater -> slow down the heartbeat, centralise blood flow to vital organs, save energy.”
- The application:
- Fill a bowl with ice-cold water (or ice cubes if necessary).
- Hold the air.
- Dip the face completely in the water for 15-30 seconds.
- Repeat until the high voltage decreases.
- Why this helps: It is a physiological compulsion. You can't not Be calmer. It stops panic attacks and outbursts of anger physically, not psychologically.
B. Intensive muscular effort (Skill: Power-Out)
With high tension, the body is flooded with adrenaline and cortisol. He is ready for ‘fight or flight’. Now, when you sit on the sofa and discuss, the engine turns to the red area when idle.
- The application:
- Sprinting (once around the block, as fast as it gets).
- Wall sits (back to the wall, legs at a 90-degree angle, hold until the muscles burn).
- Burpees or push-ups to muscle failure.
- The statement: You give the body exactly what it has prepared itself for chemically: physical action. This is followed automatically by exhaustion relaxation.
C. Sensory Focusing (The 5-4-3-2-1 Technique)
Well suited for dissociation (when you feel like you're not real or standing next to yourself).
- The application: Call out loud (or in your head):
- 5 Things you see (The crack in the wallpaper, the blue cup, the light on the router …).
- 4 Things you feel (The fabric of the jeans, the floor under the feet, the table …).
- 3 Things you hear (Cars outside, fan noise, breathing).
- 2 Things you smells.
- 1 Thing that you tastes.
- Why this helps: It forces the brain to channel resources from the ‘emotional alarm centre’ back into sensory perception and processing. It's like a task manager that kills processes to free up RAM.
9. The restart: The ‘repair protocol’ after the dispute
Setting boundaries often leads to distance for a short time. For people with borderline, this distance feels like the end of the relationship. This is why the phase after Post-processing is more important than the conflict itself.
How do we restore the connection without softening the boundary?
Step 1: Timing (note latency)
Do not attempt reconciliation as long as one of the two still sees ‘red’.
- Example: You had a fight, you set yourself apart (‘I'm going out now’).
- Error: After 5 minutes run back in and ask: ‘All right?’ – That's too early.
- That's right: Wait for the pulse to normalize. This can take 30 minutes or 2 hours.
Step 2: The ping (careful contact)
Before you have the big conversation, you send a small signal of security.
- Action: Make a cup of tea and leave without comment. A short message: “I'm still mad, but I love you.”
- Message: “Our conflict does not change my fundamental loyalty to you.” This greatly calms the fear of leaving.
Step 3: Meta-communication (talking about the system, not the content)
Does not analyze who was right, but How you communicated.
- Script: "Okay, that was tough earlier. I withdrew because you were screaming. That was too much for me. How did you feel when I left?’
- Objective: Understand how each other's mechanisms work. "Ah, when I scream, you go. If you leave, I'll panic." – This understanding creates closeness without anyone having to ‘win’.
10. Troubleshooting: The 4 Most Common Bugs When Setting Borders
Even with the best guidance, it doesn't always go smoothly. Here are the most common sources of error and how to debug them.
Bug 1: The ‘Extinction Burst’
- The phenomenon: You're starting to set boundaries. Suddenly, the partner's behavior worse instead of better. He no longer calls 5x, but 50x. He's getting louder, more aggressive.
- The statement: It's like a vending machine that swallows the money but doesn't give cola. You press again (normally). Then you hammer against it (escalation). You're testing whether the old strategy really doesn't work anymore.
- The solution: Hold on! If you give in now, your partner will learn: ‘Aha, I just have to call 50 times and yell, THEN he'll answer.’ You condition him to escalation. If you remain steadfast, the behavior ebbs away.
Bug 2: The Inconsistent Border
- The phenomenon: On Monday, you say "no" to shouting. Tuesday you're tired and let it pass over you. On Wednesday you say "no" again.
- The problem: This is called ‘intermittent reinforcement’. It is the strongest principle to cement behavior (as in gambling: You only win from time to time, so you continue to play addictively).
- The solution: Prefer to bet less Limits, but the ones you set must be 100% be defended. Pick your battles.
Bug 3: The ‘Declaration Trap’ (YES: Justify, Argue, Defend, Explain)
- The phenomenon: You set a limit and immediately deliver a 10-minute monologue as to why you are allowed to do so.
- The problem: You are signaling uncertainty. He who justifies himself accuses himself. In addition, you provide the opponent with attack surface for counter-arguments.
- The solution: Short and succinct. ‘I don’t want that.’ is a complete sentence.
Bug 4: Using Boundaries as Punishment
- The phenomenon: “Because you were so bitchy yesterday, I'm not going to eat with you today.”
- The problem: This is not a limit (self-protection), this is revenge (education). It destroys trust.
- The solution: Check your motivation. Do you do it for yours Protection or for the other one to wipe out? Boundaries look forward (protection), punishments look back (retribution).
11. FAQ: The most frequently asked questions of relatives
Here we answer the critical questions, which are often not spoken out loud.
Question: Am I a narcissist or egoist when I set boundaries?
Answer: No. Many BPS sufferers accuse their partners of ‘egoism’ or ‘coldness’ (projection) when they set limits. A narcissist uses boundaries to devalue others. You use boundaries to keep yourself. This is healthy self-care.
Question: What if my partner accepts the border but is sad for days?
Answer: You have to endure this (tolerance of negative emotion). If you take back the boundary just for the partner to smile again, you're back in codependency. You can validate his grief (‘I see you are sad’), but the limit remains.
Question: How do I explain to children why dad/mom is sometimes so ‘weird’ and I set boundaries?
Answer: Child-friendly and honest. “Dad sometimes has emotional storms in his head. If he screams, it's not your fault. I will then stop so that we can all calm down." Children learn from your example that you can protect yourself.
Question: Can I change borders later?
Answer: Yes, yes. A system update is always possible. “I have noticed that our rules on calls do not work for me. I want to renegotiate this."
12. Glossary: The most important technical terms briefly explained
For technical understanding – knowledge reduces anxiety.
- Validation: Recognising feelings as ‘real’ and ‘understandable’ (without necessarily agreeing to the behaviour). The opposite of ‘don't act like this’.
- Dissociation: A protective mechanism of the brain in case of overload. The affected person switches off, stares into the void, feels numb. Skills such as ammonia or ice help here.
- Invalidation: Reconciliation of feelings (‘You can only imagine that’). The strongest trigger for BPS crises.
- Skills: Stress tolerance skills (e.g. ice cubes, hot candies, breathing exercises) that instead Self-destructive behavior is used.
- High Expressed Emotion (HEE): A style of communication with a lot of criticism, hostility and emotional over-involvement. Poison for BPS relationships. The aim is ‘Low Expressed Emotion’.
13. For the relatives: Why guilt is a ‘false positive’
Finally, a word to the partners, parents and friends who read and think this text: “That sounds logical, but I feel so guilty when I say no.”
Imagine you're a lifeguard. Someone drowns and clings to you in panic. He's pushing you under water.
If you don't keep him at a distance, you two will drown.
Pushing him away to breathe feels brutal. But it's the only way to gather strength and then safely pull it to shore.
Your sense of guilt is a false positive of your empathy system.
It says: ‘You're hurting him.’
The reality is: “You make sure you stay stable so you can help tomorrow.”
A relative who sacrifices himself completely (burnout) is of no use to the borderline sufferer. It becomes another factor of instability. Your stability is the greatest gift you can give your partner. You are the rock in the surf. And a rock must be solid, otherwise it will be washed away.
14. Summary: The checklist for everyday life
Print out this list or save it in your mobile phone.
| Phase | Checkpoint | action |
| Before | statuses | Am I just stable (green) or stressed (red)? |
| While | clarity | Do I formulate a wish or a hard limit? |
| validation | Do I acknowledge each other’s feelings (‘I see your pain’)? | |
| consequence | Am I willing to go through the consequences (e.g. leaving the room)? | |
| After | Re-Connect | When and how do we find each other again? (Repair) |
Boundaries are not lines of separation. They are the seams where two different people can grow together in a healthy way.
Start today. Not with everything at once. Make a small border. Test them. Survives the ‘storm’ afterwards. And celebrate the success of both of you standing still – more stable than before.
Note: This section contains affiliate links. If you purchase via these links, I will receive a small commission at no additional cost to you.
References: The ‘handbooks’ for relationship & psyche
Here are the most important books that cover the subject of boundaries and BPS in a well-founded way:
1. The classic for relatives (the ‘operating system manual’)
- Title: Stop the egg dance: For relatives of people with borderline personality disorder
- Authors: Paul T. Mason & Randi Kreger
- Why this book: This is the Bible for this article. It coined the term ‘walking on egg shells’. It focuses almost exclusively on how to draw boundaries as a relative without breaking off contact.
- Use Case: Mandatory reading for partners and parents.
2. The basic work (system analysis)
- Title: I hate you – don’t leave me: Understanding Borderline Personality Disorder
- Authors: Jerold J. Kreisman & Hal Straus
- Why this book: Explains the internal mechanisms (splitting, fear, anger) very comprehensibly. It helps to understand the ‘logic’ behind the seemingly illogical behaviour.
- Use Case: To understand why the ‘software’ reacts the way it reacts.
3. Specifically for partnerships (The Network Protocol)
- Title: Borderline relationships: A guide for those affected and relatives
- Author: Manuela Rösel
- Why this book: The focus is purely on pair dynamics. It analyzes typical conflict patterns in relationships and offers solutions for communication and sexuality.
- Use Case: When it comes specifically to love and living together.
4. The practical guide (the coding tools)
- Title: Interactive skills training for borderline patients
- Author: Martin Bohus & Martina Wolf
- Why this book: Martin Bohus is the German ‘Pope’ of DBT. This is not a reading book, but a workbook (often with material download). It contains all the skills (stress tolerance, emotion regulation) as concrete exercises.
- Use Case: For people who like structured worksheets and clear instructions (‘If X, then do Y’).
⚠️ Important note (disclaimer)
The books and tips mentioned here are for information and self-help (psychoeducation). They do not replace a professional diagnosis or therapy by a specialist or psychotherapist. In case of acute crises or suicidality, please call the emergency number (112) immediately.
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