Need advise

I’m 32 currently separated and going through my divorce. I have two children one is 5 and the other is 4. I started talking to a guy 2 months ago we had sex one time with no condom. I’m on the birth control pill and just found out I’m pregnant. I’m thinking abortion would be the best choice because it was unplanned and I really don’t know him that well yet. He is 35 with no children. We aren’t dating.