Hi vl I'm sorry that you feel stuck in this situation/relationship... obviously your "ex" isn't quite that..yet?

PTSD only becomes worse without treatment... sometimes it progresses faster than not.... but DID tends to "break down" with age... the coping mechanisms that worked so well as a child, or early onset of trauma, begin to not work so well as adults, or as they venture out into the real world. Your "ex" has decided to self medicate with an age-old remedy: alcohol. He sure sounds like he needs someone who is consistent with being "there" but also with the same information over and over again... he needs professional help... he can learn to cope differently ... and can lead a life that is worth living... it will take work, I wouldn't know if he has it in him to do so.. good wishes.