Need advice...

My boyfriend of 3 years and I broke up a month ago because of long distance mainly. Our jobs wouldn’t allow either one of us to move. We’ve stayed friends bc we still love each other and bc of the possibility that one day we would live closer and try again. However, he is on a guys trip to Cabo this week and he is on my phone plan and I’ve seen about 30+ texts back and forth with a few sex lines. Varying from 4pm to 3am. I know bc I called them all. I know we aren’t together so he isn’t cheating on me but he has no idea I know this and wondering if I should say something and if so what should I say? I am disgusted at the thought of him having sexual intercourse with a prostitute and almost want nothing to do with him, but I do not really have confirmation this happened other than texts message time stamps in our cell record to these sex lines.

Please any advice would help a ton.