I am really sorry to hear about your situation but I do want to offer you my support and story.
39 years ago my mum found out she was pregnant with me and promptly walked out on my father. He had been violent, verbally and emotionally abusive due to alcohol, and had gone so far as to put a gun to her head and threaten to kill her. He was ridiculously possessive and she had to go down to the corner gas station to put on her make-up before work, and then take it off again before going home or he would get nasty. When she discovered her pregnancy, she said she could not bear to think about raising me in that environment and she left. She did not allow me to have contact with him growing up, and he only made 1 or 2 half-hearted attempts that I know about. (Never paid her a penny in support either!) I did know my grandfather and a few aunties, but my father was out of the picture. She said that I could make up my mind about what kind of person he was after I grew up.
Truthfully, it was hard as a kid because I wondered about him a LOT, and she was rather close lipped about him. In retrospect though, I have NOTHING but respect for her courage to do what she did and I know I am better off for not having been exposed to that type of craziness. It was not easy on her and I know it won't always be easy on you. But you CAN do this and it may work out better in the long run. I'll keep you in my good thoughts and I wish you loads of blessings.
Courtney