Is this guy having an emotional or physical affair? Trust that what you saw is evidence that goes against your values. Or you wouldn't be writing to us. When someone lives against what you value then you see concrete evidence that you can choose if you want to stay or leave. We don't need to tell you what is right there for you to see. You've proven it. (I'm intuiting this message for you but I also have had personal experience.)
I felt it when my ex husband was looking for women's attention elsewhere. And then I found proof. I ignored it. Years went by. The feelings got stronger. He cheated. And then we proceeded with a very messy divorce. You know when you know. It's never easy to see when you have to make a choice. But now know.
I hope for the best for you.
