Turn so you are facing your girlfriend, and not him, whisper something like
"Wow, he wants you so bad, look at him, i'll be nice, be back in a sec"
Or something that portrays that you can't give half a fvck what happens, then, wink, walk off, and like the guy above me said, just go out, talk to some randoms, stuff like that.
One thing though, you must really establish that you are the prize with her, and i mean the ultimate prize, cause if she is still uncertain, she will see you with other girls, and try and make you jealous with the little pawn that she found, and everynow and then, a girl will go as far as kissing, making out, whatever with guy, to see your response.
If she knows you are the best thing in the world, and already know your response, she will come over to you and beg you to kiss her in front of everyone in the room.
"Wow, he wants you so bad, look at him, i'll be nice, be back in a sec"
Or something that portrays that you can't give half a fvck what happens, then, wink, walk off, and like the guy above me said, just go out, talk to some randoms, stuff like that.
One thing though, you must really establish that you are the prize with her, and i mean the ultimate prize, cause if she is still uncertain, she will see you with other girls, and try and make you jealous with the little pawn that she found, and everynow and then, a girl will go as far as kissing, making out, whatever with guy, to see your response.
If she knows you are the best thing in the world, and already know your response, she will come over to you and beg you to kiss her in front of everyone in the room.