I'm in a situation that is hard to deal with. There's a bunch of baby mama drama and I just don't what to do?

I think that despite what you say, this is something that you are not going to ever really get past. He chose all to not prevent a pregnancy, he chose the girl who carried his child and even though you didn't steal him from her, you are the one who is always going to have to live with the consequences of his involvement with her. You have picked a hard road and I hope he is worth it.