While I am not a mental health professional, I can provide some general information. It's important to note that mental health conditions can manifest differently in individuals, and experiences can vary greatly from person to person.
It is possible for a person to develop BPD-like behaviors or traits when in a relationship with someone with NPD (Narcissistic Personality Disorder) or other emotionally challenging dynamics. This can happen due to the impact of the relationship and the emotional toll it takes on the individual. Being in a relationship with a person with NPD can be emotionally tumultuous, and it may cause a range of responses, including feelings of abandonment, depression, and mood swings.
When the relationship ends, the intense emotional triggers and stressors from the relationship may subside, leading to a reduction or even disappearance of some symptoms. It is not uncommon for individuals to experience relief or a sense of freedom after ending a difficult or toxic relationship.
However, it's essential to remember that every individual's experience is unique, and there are various factors at play. It is also possible that the symptoms may resurface later or manifest in different ways if the underlying issues are not addressed or processed in a healthy manner.
If you are experiencing distressing symptoms or struggling with emotional challenges related to past or present relationships, seeking professional support from a therapist or counselor can be very beneficial. They can help you explore your feelings, identify coping mechanisms, and provide tools to manage emotions and stressors more effectively. Additionally, they can assess whether BPD or any other mental health condition might be present and offer appropriate treatment options.