Because they are entitled to flirt with whoever they wish and just because a guy has a girlfriend it does not follow that no other female is permitted to enter into conversation with him. And, when it comes down to it your concern should not be about what she is doing, it should be about what he is doing. If a guy only has eyes for his girlfriend then it does not matter who is flirting with him or who he is chatting to. Of course, this is all very well and good but when you are out together and some red-hot female starts chatting him up, you wouldn't be human if it did not make you feel uncomfortable at the very least. When this happens (and it will, because that is life), the best thing to do is to exercise serious self control and behave well. That means, hiding the fact that you feel like crying, hiding the fact that you feel awful about what you have on/how you look and so on, There is little more sexy than self-confidence and if yours is growing less with every passing moment, you have to pretend that nothing could be further from the truth. You don't have to feel confident to act confident - jealousy is very unbecoming so hide it - no sulkiness, no being moody or quiet and subdued. Instead you pretend not to have noticed her flirting (even though your eyes have seen nothing else all night). You smile and laugh and pretend to be having a fun night out. This has two benefits. 1: it saves face - it may be a horrible night but at least you will end it with your pride intact and free from embarrassment, and (2) the BF will notice that you have not noticed and this will shift the balance of power more in your favour. If you are confident enough not be be worried by her then it will stand out a mile. Sexy is strong, powerful, confident, a woman who is way above being needy or tearful over such situations. She may well boost his ego initially but behave well and it's you he will be watching and wondering if perhaps you're not as smitten as he thought you were ......and that, is a decidedly unnerving thought indeed.

Personally, I like my men free and clear. But I bet it has soemthing to do with " If I wanted I bet I could have him even if he is taken" +5