After various suspicious incidents, all of which he denied, I found all the messages on his phone. Turned out he has been shagging a young colleague for months. I feel so bloody stupid. Have 2 DC of primary age who love their dad and don't understand why I'm angry. He says he knew it was wrong but it felt great.
I feel like I'm staring at the wreckage of the life I thought I had. Have been sobbing and not eating.