The two points your cousin makes are both good octy, do you agree with them?  :)o you wish that she wasn't disordered? Can you separate her world from yours and see the differences?
If I relate even the first two months of the story I get looks like what the heck were you doing staying with her. If I continue, I get either "you dodged a bullet" from the wise, or a look like I must be crazy to have stayed from everyone else.
In the immediate aftermath I was told by my aunt(a child psychologist, I know, they're everywhere in my family and it's almost the first time I've noticed) to stop excusing her because of a disorder. That I was one of the most caring and honest people she knew and didn't deserve the accusations as my ex continued to impulsively do what she accused me of doing, over and over. That I was lucky to have found out everything before getting any further, but I convinced her that I needed to understand and be compationate, or else I might continue to blame myself or else have almost hate in my heart for my her.
She is 8 out of 9 on the DSM in my completely unprofessional opinion minus the self harm/suicidal thoughts, but my cousin said self harm can be in many forms. If she wasn't disordered then she is a lier, cheater, intentional manipulator, masochist, and malicious person so why did I want to be with her? What was my own malfunction?
In the context of the conversation I believe he knew that I still would want her back and that I continue to blame myself, but that what I want back wasn't what she was. That only if she was well would my moments of different actions have changed much. I either have hope that she was what she wasn't(well)or can't get it through my head that I couldn't fix her disorder(he uses DBT in his schools) myself. I knew nothing about BPD yet(I actually thought she had disassociative disorder with her multiple takes on things moment to moment).
Her "world" was only open to those close to her and I had seen the madness, yet I still tried to conform to the impossible.
She once said that I wished she'd get in an accident and become crippled so that I could leave her. Towards the end these were everyday random thoughts. OUT OF NOWHERE. She was cheating and stalking me, yet If my phone was charging I was up to something. She was caught red-handed(she left a browser open) yet I was reading things wrong(verbatim would have worked with these messages in court). I'm rambling, but here is where I'm supposed to right?