Having a baby with a guy that left me

His family and my own hate each other for valid reasons. He has hit me before and been abusive, especially emotionally. Many people that know him suspect that he is slow or has no emotions, and quite possibly bipolar. I had heard that he was just using me for sex through my friend, my brother, his friend, and lastly his mother. His family doesn’t like me because he was never serious about me and we are having a kid. They thrive on drama, get kicked out of every house they live in due to living in what is pretty much poverty although they sure can run up a tab at the bar, buy their cigarettes and lottery tickets every day, and crash every car. They are alcoholics, and into drugs. Noone in the family has any sense of doing the right thing and are lacking some much-deserved respect and decency. the mother is going to jail for fraud soon. I said I was going to get an abortion, but I cannot bring myself to do it as I have realized that this baby deserves life and I am the mother. But I am really at a loss of what to do. The father is no longer talking to me and I don’t know whether he wants to be in the babys life or not or even if he should be. I am only 20 years old and I’m not exactly financially well-off or even stable. I just do not know what to do anymore.