You have given us no information as to what their relationship is like. You don't describe the way they talk to each other, or about each other, or anything like that. All you say is "they've been dating," which means nothing to me since my definition of a date is dinner and/or a movie and/or "cuddling". Since you say they've never met each other in real life, I have absolutely NO information to go on. As far as I know, they could be simply good friends on Xbox Live, or they could be sexting. I need more information.