In order to go into my text messages, he would have had to first do the non-passworded slide unlock (my previous to today insurance against me accidentally bumping the screen icons), tap my texting icon, then scroll through the list of text conversations, find the one between my best friend and I, and then tap it. I don't see any of that being done 'by accident' when my phone would give him no reason to pick it up to check it - if it vibrated, which it didn't.
Anyone else been in this situation? How did you handle it? I'm a trusting person, and have not had to confront anyone on this sort of thing before.