Girl flirting with my guy

My advice to you is not to worry about everyone else the only people you have to worry about in a relationship is you and the guy you are in it with. If someone else outside of it is flirting that's their problem. So if your guy isn't flirting back and or is just being sociable then don't worry about it to much. As to how you should act around her you should be civil and nice if possible but if you have seen her flirt with him and you don't like it show it. Don't be rude or mean right away but stand your ground and show more through actions that he is your boyfriend and he is taken and no for her. Because not knowing the situation and if she has seen you together or not she might not know he has a girlfriend, or she might just naturally be flirtatious and not mean anything by it. It's that she is just being nice. You're going to have to follow your feelings as well as (I would recommend) talking to your boyfriend about it and see if he thinks it is flirting or just her being her and if he even cares, because there is such thing as one sided flirting and if that's the case I would just write it off and trust him.

Well you're not supposed to do anything...it's up to your boyfriend.
If he accepts her flirting...then shame on him..I think he should stop her or something...
I don't know but it's weird... to let you know I would accept this...if I want my girlfriend get jealous.
that's all

Same thing with me. My boyfriend is a grill cook at friendlys and every one of the waitresses hit on him. I hate it. He doesn't like any of them and I know that but they like him and it pisses me off. So personally I'd confront her on it. She knows he's with you obviously but she doesn't care. Confront her on it, show her that you won't take her hitting on your man and you won't deal with it. She should back off.