Pregnant and Alone

I was with my boyfriend for 2 years and recently, around the beginning of May, we broke up. Immediately after, we stayed being friends and had sex a few times. Well, about a week ago I found out I was pregnant, and around the same time, he got a new girlfriend. He is so caught up in that and "hurting her feelings" that he said we cannot see eachother during my pregnancy, and that he will be in the baby's life after it is born. We are only 18, and I can't do this by myself. I don't know how to get through to him. What do I do? Am I just being too sensitive or should he go through this pregnancy with me? I feel so alone with it all.