Quote:
if she will flirt with other guys when with you then you should cut her loose.
Bravo!
Seriously, a girlfriend - and I want to reiterate, girlfriend - that chooses to flirt with another guy, in front of you, is just someone with an illogical attachment who's sole purpose is to take you for all you're worth.
A couple things:
If he's your friend or buddy or whatever, and he's hitting on your girl (Now there is a fine line/gray area that splits what is flirting and what is being social. Make sure you're not confusing the two.), then in all reality, he's not your buddy.
Trying to get YOUR girls = Not a friend.
Second:
If your girl is flirting with him back (once again, is it social or actual flirting/hooking up?), then it's time to move on. Dump her before she has a chance to break your heart.
The last thing I want to mention:
Instead of sitting back watching this happen, go talk to OTHER girls. If she can flirt, why can't you? It'll be a good opportunity to practice approach and opening, that way if something does happen, you'll be ready to go find a new girl.
(p.s. If she tries to get in an argument about you 'flirting' with other girls, bring up that she is flirting with your buddy. Chances are she'll deny it and say it's just social. That's when you tell her that you were just being social as well."
Hope all works out for you!