I need help 🙁

So last night I found out ny SO was "emotionally" cheating. Just meaning he didnt sleep with the girl. Im 5.5 months pregnant. I'm devastated. He did the same thing 2 months before I had gotten pregnant

And I agreed we'd work on things befause he didnt sleep with the first one either. But I'm torn on what to do. If I stay with him and try to make it work how am I supposed to look my family and friends in the eye. But if I dont try how am I supposed to look my son in the eyes. We live together and I can affort this place without him, but at the same time I dont want to be miserable either. I have no where else to go, and i love our little house and our nursery. I just dont know what to do.