I'm sorry, but you do NOT want someone like that being the Daddy of your child. Yes he is technically the father, but I would urge you to consider whether you want someone that unstable to be a part of any child's life. You hardly know him (not judging you at all! He clearly has done a personality turn-around) and I certainly wouldn't be trying to patch things up, at the very least not at this stage. I really feel for you, I'm sorry this is how things have turned out for you. But my opinion is that pursuing this guy is just going to lead to much more hurt for you and your child in the long run, people like that do not change.