Not sure what to do

I am almost 7 weeks pregnant, and I just found out the dad of my baby was cheating on me in the beginning of our relationship. The girl he cheated on me with is the one who ended up telling me and showing me all of the evidence. When I even brought it up to him he said it’s a lie but I had the proof in front of me. He told me he just wants to move on from it and he broke it off with her because he realized that I am the one for him after doing it. He wants to be part of the babies life and honestly I’m debating on if I want him in my life or his kids life. What should I do??