In case you weren’t familiar, borderline personality disorder (BPD) is a mental health problem.
When someone has it, their attitudes, beliefs and behaviour can cause longstanding problems in their (and your) life.
You often struggle to deal with your own emotions yourself, let alone letting someone else in to get to know them.
Most real-life relationships with a partner who has BPD are not deadly.
Nevertheless the healthy mate wonders, ”Why are we on these constant roller coaster rides?
If this ship becomes a timeless elegant regatta or a wrack is heavily determined by the personality styles of the involved partners’.
Remember we all have personality traits, which does not make us personality disordered.