Talk to her about it and tell her it makes you feel uncomfortable. However, she's probably just going to think you're just insecure. Although if YOU wore a man thong around a bunch of girls, she'd probably be the same way.
I saw my gf which I have a crush on wearing a bikini around a crowd of boys. What do I do?
You saw your "gf which you have a crush on"....I would hope you are crushing on your girlfriend. Is she really your girlfriend or just your crush? Also was she near water or someplace sunning herself? Or was she just walking down the street in a bikini for no reason?
If she was wearing a bikini in a reasonable situation, you do nothing. If it wasn't a reasonable situation you re-evaluate your relationship, and her. She would have to seeking attention to do that. You would have to wonder why.
Was she at the beach? I wouldn't worry about then :) and it's awesome you have a crush on your girlfriend ! If she was in a library or something wearing a bikini then I'd be concerned.
