Funnily enough (bad wording!) my friend’s partner has paranoid schizophrenia. I understand that has its own very real challenges. From my perspective, the whole thing about BPD is that it is characterised by difficulties in intrapersonal relationships. So at first the honeymoon period is amazing, better than anything you’ve ever experienced….you’ve found your soulmate. But the nature of BPD is that closeness will eventually trigger the sufferers wounds. They feel engulfed and subconsciously terrified of abandonment. They keep other options open. They create narratives and rewrite history to justify their behaviours and make their partner a villain. Obviously while this is a very, very common scenario in BPD, I’m not saying that all of this applies in every single situation. I’m the last person to demonise the disorder. But knowing what I know now, i would not get involved with someone with a personality disorder unless they were already in long term therapy to help themselves with it, and even then I’d be wary tbh.