Most Helpful Guy
Don't take this the wrong way but it may be a combination of things that has led him to this point. I think the fact that you both are young and have a child is a couple of reasons. The way he acts towards you and your child shows he's not fully committed to taking care of the baby or being with you. He has a young mentality which consists of enjoying himself, video games, and possibly being with other girls. As far as custody goes he may want to get rid of you and live his life but still support his child.
Most Helpful Girl
Honey, save yourself, save your baby. You are far too young to be going through this. Dump that guy! There has to be one member of family, or even a friend, that will assist you.