What are the pros and cons for not wanting him to be on the birth certificate?

I am 18 weeks into my pregnancy and within the last two weeks both my friend (who is the father) and I aren't on stable terms. Several days ago I have packed my things and left back for home because when he and I lived together it was constant stress, arguments, and hostility, especially further along in the pregnancy. I strongly don't feel he deserves to be put on the birth certificate because when we were living together, and we did argue, I was afraid that we might have to get violent with each other. He claims to still try and assist me and the baby but my instinct is telling me otherwise. I don't want any sort of assistance from him, nor even want him present when I deliver. I know this is early to make such rash decisions like this, but I can't continue taking this stress, and neither can he, and I don't want to lose the baby because of stress or depression. I did some research, however I don't want him paying child support or any kind of support. I refuse to take his money when my own family is taking his place as the sole supporter.