husband cheated

a few days ago i found out my husband has been cheating on me for almost my whole pregnancy. I’m 38 weeks and get induced in less than a week and i’m at a total loss. I had suspicions but kept telling myself i’m crazy and ignored them. the girl doesn’t live here and lives 5 hours away and they only met up a few times and the worst is that she knew about me and that i was pregnant. They never slept with each other or even stayed the night together but i don’t think that makes it any better. He claims he didn’t mean for it to get this far and tried to break it up multiple times. in 5 days it’s our 5th wedding anniversary and we have been together since we were teenagers (9 years) we moved away from our hometown and live 300 miles away from everyone so it isn’t like i can just move in with family immediately. part of me wants to stay but i know it’s going to eat me alive forever if i do. i love him but ive never felt so empty. we did separate for a few months and i went and stayed in our hometown but we agreed for me to come back and make things work but he was still talking to her up until a few weeks ago. Right now we’re trying to just focus on being the best parents we can, for some reason i forgive him and have a hard time setting personal boundaries. He just keeps saying it was a huge mistake but i don’t know what to believe. i know everyone says i should leave or “if i were you i would ____. “but a lot of those people haven’t been put in this position to know what they would actually do. i asked if we could go to counseling, not to necessarily fix our marriage but to at least try to have a good relationship enough to coparent. I’m staying to have the baby and recover but i don’t know what the future hold whether i truly stay or leave him. i am at a complete loss and i don’t know what to do. my heart aches but i know i need to be stronger for my baby but it’s so hard.