How do i get over this?

A good place to start would be to stop monitoring what he is up to online. You will only make it more difficult for yourself if you keep an eye on his every digital move. If you really want to get over this man you have to accept that going forward, what he gets up to has nothing to do with you. Likewise you can claim the same for yourself so whether you get back in to the dating game now or later it has nothing to do with him.