Not sure I can go through with pregnancy

I am 7 weeks pregnant and just found out my partner hasn’t been so faithful and got his tinder profile sent to me from a friend (while he’s out of town-ish for work). Everything was great until he decided to do this and instead of admitting it he turned it around and said it isn’t true, it can’t be, he has no idea how, am I just playing games with him? Is it just my mood? Literally trying to turn it around on me. He realised I wasn’t taking his bs and admitted to it saying he wanted to see if I was on there and to show his single friend what tinder was, instead of making the “single friend” a profile of his own. I’m already a single mum with a DB baby daddy, I’m petrified to go through with this and be a single mum again as he doesn’t exactly live here with me or my town so won’t be around much to begin with, now I doubt he will at all that I’ve left him. Am I wrong to even consider an abortion?! I know he will think so but I just don’t think I can do that to myself or my children.