Baby daddy issues

So I've known this guy for 10 years. We have been best friends ever since I can remember. We started dating March 13, 2015. I recently just found out that I'm 3 months pregnant for his kid & I was gone at boot camp for two months. When I got back I found out he had sex with some girl he went to high school with. And I went to his house two days ago to confront him about it. He apologized and I told him he had six months to fix everything. We made love that night but I haven't heard from him since 10 AM yesterday. What would you do? I just don't want my child to be without a father. I want this to work. Am I wrong ?