How to tell my boyfriend I don't want him in the delivery room?

I'm almost 15 weeks pregnant but I already know that I don't want my boyfriend in the delivery room. He's been really mean and abusive lately... I don't know how to tell him he's not allowed in the delivery room when I have our baby.

I thought he was so loving and supportive in the beginning but I realized it's been all talk. He hasn't spent any money on helping me get things for our baby, seems to be more into his friends, etc. He's just acting immature and not taking things serious. He also doesn't care to understand how it is for a pregnant women and how hard it is. Especially being on bed rest due to placental hemrogging (spelling?), I still end up having to do everything around here even when he knows how dangerous it is. Ugh...

Thanks for any help.