The father is confused

I'm 5 weeks today and I've know that I'm pregnant for 5 days now. From the beginning of him knowing he wants nothing to do with the baby. He says he will break up with me if I keep the baby, and that if I abort it he will stay with me. I'm 18 and I know I'm not ready for a baby, but I do not believe in abortion. My family and friends are behind me for support, but I need the father to be supportive as well. I'm so scared and I don't know what to do. This is all so overwhelming. I don't want to be pregnant but I am, and I need to take responsibility for my actions. But I'm still so confused