The thing is, we don't know how much time the OP's ex was spending in her RP. It might have been most of her free time, it might just have been a few hours here and there. And there ARE people who freak out when their SO wants to spend a few hours here and there with other friends, or doing things that don't involve them. I've dumped guys before for getting pissy with me about the time I spent studying for my classes. I know girls whose partners have tried to cut them off from all their other friends. IME shit like this is not all that uncommon. We only have an extremely vague version of the OP's side of the story, and for all we know, the OP WAS the one who was out of line.