Decisions

So I just found out that I am pregnant, about 6 weeks along. It's an extremely unexpected pregnancy, and for my roommate/ex, an unwanted one. He's 19, not even 20, and for a while when we had talked before he had said we can't get pregnant because he can't have a kid at 19. Ever since I told him he's been blaming me for getting pregnant, saying I wanted to, that I'm one of those psycho girls who gets pregnant to keep their boyfriend around, and that I want to f*ck his life up. He's now pushing the abortion decision, saying I need to be on board with it and won't even let me speak about it to anyone. In the back of my head though all I keep saying is I don't want this, I don't want to get rid of it, and I don't care if he stays around, frankly after the way he's been acting, who would? I just don't know what to do to get my words out without getting him mad. With the way he's making it seem, it's like he doesn't care about my feelings or anything, he's only concerned about how this will damage his image to his friends and family. I don't know what to do and could use some advice from someone who maybe has gone through something like this?