Depressed, he doesn't want the baby 100% but I do

I found out recently that I'm pregnant (im 21) and I wanted to keep the baby. I'll be done college in a couple months before the baby gets here.. thing is the guy that's most likely the dad (my ex, I did sleep with 2 other guys though) is being very aggressive and angry and wanting be to get an abortion. I've never, ever felt so depressed and suicidal in my whole life. I know things are really rough being a student and not having a career but I didn't want to abort this baby because I know how horrible I'd feel for the rest of my life... he said he's willing to do a DNA test but he said he won't love me anymore and he'll be very angry if I go thru with this. What do you guys think I should do ? I'm so scared and alone