Ok this is for the girls what would you do in this situation?

Ok girls what would you do; I'm nineteen and just found out I'm pregnant. The father of my baby is more intrested in his damn derby cars and motorcycles and parting than the baby. In fact the day I got my blood test results back and we found out that we were pregnant he said oh ok...I don't want you to think I don't want to be with you but I need to go finish my derby car. And then whenever I say ok lets go talk about this he's always "busy". So I told him don't worry about the baby I can do it myself and I don't want his help, and now all of a sudden its oh I'll be there for you I want to help you and the baby out and blah blah blah, but he's putting no effort into it. So should I just dump his *** an raise the baby by myself or should I keep giving him chances?