What on earth good is repeatedly harming yourself supposed to do in terms of "making people love you" and changing their minds about leaving you? "I'm leaving you. I've thought about it and this just isn't working." "No! I can't face life without you! If you leave, I'll stab myself again!" "Sorry. I have to leave. This relationship is making me unhappy/I can't handle your dependency levels/The idea of spending any more time with you fills me with dread. I hope you find someone who can give you everything you need. Goodbye" "Noooo!" *stab* "oh, that's changed my mind, you're obviously the ideal person for me to live with forever and I think we should have babies" ???? I guess the question is, does he have mental health trouble, or is he just a drama queen? Tough call.