My crazy relationship

So me and my boyfriend been together for 3 years, and during May I found out that he was talking to some other girl but not only that! I found out that he going to be a dad with her. But he regrets all the mistakes he did but not regret the baby. She is due on January 2019. I left the house and it’s been about 5 months already that we been separated, he been winning my heart once again and I’m falling for him. I want to give him a second chance. He doesn’t want anything with that female just to be a dad to her daughter. What you guys think ? I might be pregnant by him also.