Is one time enough?

Is one time cheating enough to end a marriage? I'm trying to figure out if it's worth fixing or not. We aren't having sex, and I haven't said I love you in months. It feels like a roommate I sleep in the same bed with. We've had problems in our past with texting other people (on both sides) but nothing physical until we got to South Korea. He slept with another woman and she got pregnant, she got an abortion this is the part that hurts the most. That he didn't even have enough respect to wrap it up. We have a 2 yr old and I don't want to take her away from him, but I'm not happy at all. I need some advice. And yes I know I was wrong for texting other people. I own up to my part. I'm not perfect.