Unfaithful Husband

Hi all. I found out last night that my husband of 2.5 years, has been on & off a dating app for a couple years and has been chatting with women. I’m not sure if he’s actually ever met up with anyone. Some messages are casual but some are sexual. I feel so betrayed by him. This happened before, when we were not married and I told him how unacceptable it is. I would have never thought that even after marriage he would still do this. I never go through his phone or show any signs of mistrust but now I’m regretting that.

We live 6hours from any family and I’m debating leaving to take some time apart. I don’t want to leave, I want to work it out. But I’m scared he won’t take it seriously if I don’t leave. Any advice is appreciated.