hello, my fiance and I broke up and four days later I found out I was pregnant. I want to be happy…

hello, my fiance and I broke up and four days later I found out I was pregnant. I want to be happy about the pregnancy and I am doing everything I possibly can to be. but my heart is hurting, I miss him but he wants nothing to do with me, sometimes I really feel like he never wants to grow up or that he doesn't want to deal with his own problems so he blames me and stays away.... lately I have been more and more upset