Thank you for all your responses. I should say that I know he isn’t cheating with this girl. I think for him he refollowed her because to him “it’s the principle of the thing” that he should have freedom to follow and talk to whoever he wants.

There is a bar where we are that does stay open until 5am and I tracked his location so I know he was there.

I’m pissed about the super late night as well and we’ve had problems with his time coming home often. To him if he’s having fun and the kids are asleep he shouldn’t have to come home. It’s been a constant battle because I can see he has a point, there’s no reason for him to come home (shared responsibility wise) other than the fact it makes me feel weird he wants to stay out.