My GF and I have been together for about 2.5 years, and living together now for nearly a year. Things have been great, we're very much in love with each other, and as far as I know, have had great communication in our relationship. Now she, being a girl who's really into cars and active on a few automotive forums, gets a fair amount of attention from guys. This doesn't bother me, as I know it's just life with a desireable woman. However, at some point I think one of the guys really got the wrong idea in his head, and I'm not quite sure how to handle this situation. I trust my GF, and I want to keep things that way. But at the same time, I've been trying to impress upon her that things getting carried away online can have some pretty damagine effects on what's normally a healthy relationship. Hell, at this point there's already been damage done, I just don't know if she understands that. The guy in question is a mutual "friend" on one of the automotive boards. This is what's even more frustrating. I know he's blatantly disrespecting me by flirting with my GF online, and I get the impression this does not bother him. That, and he's never once wanted to talk to me, as a friend. This disgusts me to end. Now, I'm sure one would ask "But Art, maybe she's just not getting enough from you." Well, if this is the case (and I seriously doubt that it is) then she's certainly not talking about it to me. I'm fairly certain this is all fairly playful in her eyes, but I doubt that's what this mutual friend wants in the end. Just looking for some input, perhaps from anyone who's gone through this in the past. All I know right now is, I'm a guy and I know how other guys think. This is the very reason I know he'll want to escalate things if she lets him.