Birth father

I'm having issues with the father. I broke up with him because I wasn't having feelings for him anymore. He pretty much freaked out at me and asked why I want to keep the baby and that I think he is ugly. He then goes on about how I used him and I never wanted to be with him. He apologized to me but I'm having a hard time believing him. He was my best friend for a while and I really care about him but I'm afraid of his temper. Yesterday he came over so we could talk and then he freaks out at me again and starts saying that everything is my fault and that he cut himself the day we broke up and that its my fault that he is acting like this. He also said that I am making him crazy. I told him to leave and he did but he really needed his hat so I went to the door and he then tries to kick it open and I luckily was able to push it shut because otherwise I would have fallen down the stairs behind me. He keeps trying to apologize to me but I keep ignoring him because I don't know what to do. He said he didn't kick the door he just pushed it but it felt like a kick. He will not leave me alone. I want him to be there for his kid but if he keeps acting like this I don't think I want him there. I need some advice.