I don't know what to do.

I let me anxiety get to me. After seeing so many girls going through their husband's phones and finding stuff. I feel like shit, but I did it too. My husband none stop talks to this girl, I'm aware of it. I always trusted him. Well, she sent this facebook questions page thing. He answered all. Most weren't bad.. But the last question was "smash or pass". He responded saying "I can't answer that , but I'm sure you know".. do I say something? Even though I was peeping? Or just try to forget about it? I wish I never did that :( I mean, that's the only thing I saw. But still. He asked a question as well, but it seemed to be deleted. However, her response was still there. It said something like"your wife is lucky to have you, you're so sweet, etc". I don't know what to do