Once he’s got you hooked, he knows it will be hard, if not impossible for you to escape.
A narcissist will let you pour your heart out to him (and if you’re reluctant he will pout, prod, and beg you to tell him ALL about yourself).
*(I am not a psychologist, I have experience with this situation and I am sharing from that and my own research.
I have approached this from a females perspective, as that is what I am and what I have been dealing with in my husband).
I believe that the end of relationships with Borderlines are probably as difficult as my own experience.