Cheating? bf of 1y9m

I found out I’m pregnant 11/13. I found this from him acct yesterday. I also see he’s easily astonished by females even in public.. He’s 21 I’m 24. His family is also close to the family of a girl he used to have a thing for & Thanksgiving his family including him went to their house to celebrate. We made plans together for that day but he wasn’t making actual effort the day of. I decided after this I don’t want to be together, since I’ve seen this pattern before & it’s best for me in the long run. I come from a broken family and I wish it didn’t have to be this way.

I just want opinions if anyone has gone through a similar situation.. Am I wrong or being selfish ? (He doesn’t know I’ve seen this thread reply)

I don’t know about going the next route..

He says he loves me & that he’s never cheated on me