If you spend any time on social media these days, you might think half the population is walking around with Narcissistic Personality Disorder (NPD) or Borderline Personality Disorder (BPD). “Narcissist” has become the internet’s favorite catchphrase for anyone who acts selfishly, while “Borderline” gets thrown at anyone who has intense emotional reactions.
But let’s look at the actual clinical reality. These diagnoses are quite rare. Research shows that NPD affects only about 0.5% to 6.2% of the general population [1]. BPD is even less common, sitting at around 2.4% [2].
You know what isn’t rare? The Caretaker personality type.
Some estimates suggest that over 40 million Americans have been labeled as codependent or acting in a caretaking role, with some studies arguing that the vast majority of the population demonstrates these behaviors at some point [3]. If you are exhausted, confused, and constantly wondering “should I stay or should I go,” you probably fall into this much larger group.
The Profiles: Who is in this relationship?
To understand why these relationships are so agonizingly difficult to leave, we have to look at who is actually in the room.
The Narcissistic Profile: Someone with NPD typically operates from a place of deep, hidden shame masked by grandiosity. They require constant admiration, lack genuine empathy for others’ experiences, and believe they are uniquely special. In relationships, they often view their partner as an extension of themselves—a mirror meant to reflect their greatness rather than a separate human being with needs.
The Borderline Profile: Someone with BPD experiences the world as a terrifyingly unstable place. They struggle with an intense fear of abandonment, chronic feelings of emptiness, and severe emotional dysregulation. Their relationships are often characterized by extreme idealization followed by sudden, intense devaluation. They are in immense pain, and they often unintentionally inflict that pain on those closest to them.
The Caretaker Profile: Caretakers are highly empathetic, responsible, and capable people who derive their self-worth from fixing, helping, and stabilizing others. They are hypervigilant to the moods of the people around them. They often grew up in chaotic or emotionally neglectful environments, learning early on that their job was to manage the adults’ emotions to stay safe.
The Perfect Storm
In her brilliant book Stop Caretaking the Borderline or Narcissist, Margalis Fjelstad outlines exactly why these personality types find each other and lock together like puzzle pieces [4].
A person with NPD or BPD needs someone to absorb their chaos, regulate their emotions, and tolerate their extreme behaviors. A Caretaker needs someone to fix, someone who needs them so desperately that they will never leave.
Fjelstad points out a hard truth: caretaking has nothing to do with actual kindness or goodness. It is born of emotional dysfunction. Caretakers operate under massive cognitive distortions. They believe that if they just try hard enough, love deeply enough, or explain things logically enough, the person with BPD or NPD will finally “get it” and change. They believe chaos is normal. They isolate themselves from friends to hide the reality of the relationship. They completely abandon their own needs because they believe self-care is selfish.
The Trap of the Trauma Bond
Why is it so hard to leave? Why do intelligent, capable people stay in relationships that are destroying their mental and physical health?
The answer is trauma bonding.
A trauma bond is not just a psychological attachment; it is a biological addiction. It forms through a process called intermittent reinforcement. This means the person with BPD or NPD does not treat the Caretaker terribly 100% of the time. If they did, the Caretaker would leave.
Instead, the relationship operates in cycles. There are periods of intense abuse, rage, or emotional withdrawal, followed suddenly by bursts of extreme love, apologies, and promises to change. This hot-and-cold cycle completely dysregulates the Caretaker’s nervous system. The brain becomes addicted to the dopamine and oxytocin released during the “good” phases, making the Caretaker endure the abuse just to get back to the high of the reconciliation.
Breaking a trauma bond is often compared to breaking a heroin addiction. It requires actual withdrawal.
Should I Stay or Should I Go?
This is the question that keeps Caretakers awake at 3:00 AM. Fjelstad makes it clear that you cannot fix the person with BPD or NPD. You can only change your role in the dynamic.
If you are trying to make this impossible decision, here are the hard realities you need to consider:
Things to Consider if You Stay
- You must give up the fantasy of a “normal” relationship. The person with BPD or NPD is not going to suddenly wake up with empathy and emotional stability. You are choosing to stay with them exactly as they are right now.
- You have to stop participating in the Drama Triangle. You can no longer play the Rescuer. You have to let them experience the consequences of their own actions without stepping in to save them.
- You will need iron-clad boundaries. You must decide what behaviors you will absolutely not tolerate and stick to those boundaries, even when they rage or threaten abandonment.
- You must rebuild your own life. You need your own friends, your own hobbies, and your own therapist. You cannot rely on the person with BPD or NPD to meet your emotional needs.
Things to Consider if You Leave
- The withdrawal will be brutal. Because of the trauma bond, leaving will likely cause you immense physical and emotional pain in the short term. You will feel like you are making a mistake. You will want to go back. You have to prepare for this.
- They will likely escalate. When a Caretaker stops caretaking, the person with BPD or NPD often panics. They may rage, threaten self-harm, or launch smear campaigns to regain control.
- You will have to face yourself. Once the chaos of the relationship is gone, you will be left alone with the reasons you became a Caretaker in the first place. You will have to do the hard work of healing your own underlying wounds.
- You will eventually find peace. Most Caretakers who leave and do their own healing work report a level of peace, stability, and joy they never thought possible.
Whether you stay or go, the work is actually the same: you have to stop focusing entirely on the person with the personality disorder, and turn that intense, caretaking focus back onto yourself. You are the only person you actually have the power to save.
References
[1] Stinson, F. S., et al. (2008). Prevalence, correlates, disability, and comorbidity of DSM-IV narcissistic personality disorder. The Journal of Clinical Psychiatry.
[2] Science Direct (2026). Epidemiology of borderline personality disorder in the general population.
[3] Mental Health America. Co-Dependency.
[4] Fjelstad, M. (2013). Stop Caretaking the Borderline or Narcissist: How to End the Drama and Get On with Life. Rowman & Littlefield Publishers.