If you forgave him for doing something he now distrusts you for, then bring that up. If you forgave him for that, and he did not forgive you for the same act, then I'd say he's out of line. Being a hypocrite, whatever.
Whether he's out of line or not, though, you should've talked about this before. If he knew you frequented sites that involved cyber sex, he should've expressed his concern. If he was unaware of your website-visitations, then you should've asked if your cyber sex-ery would make him uncomfortable .
You could solve this by talking about both of your problems with each others' actions, then communicating better in the future with your next significant other, assuming you're done with this guy for good.
EDIT- Waitwaitwait, he left you for something you didn't leave him for? Okay, I'm out of my advice-league.
Last edited by Klim; 10-04-11 at 11:44 AM.
I am homosexual. A lesbian, actually. If you have a problem with that, then it sucks for you. It's not your problem. It's not even a problem. I quite like it this way.