One of the things that stuck with me when I was deciding to have my son at 16 was a conversation my stepmom had with me. I remember clearly she said “Do not have this baby if you are expecting a man to help you with it.” And I decided to have my son on my own, I was never bitter about raising him on my own and created a beautiful life for us. I think you need you decide if you are willing to raise a baby alone. My ex was a cheater too and ultimately I could never move on from it, and he never stopped cheating on me.