What should I do in this situation with my girlfriend? please help 10pts?

You are not obligated to go out with her to raves and such if you do not want to. You are absolutely right there. However, despite whether there are crazy guys and if she dresses provocatively, you need to trust that she can go out and have a good time without you and still be loyal to you. If you can't learn to trust her than the relationship isn't going to work out in the long(er) run. If you trust her and she goes out and cheats on you, than obviously it wasn't going to work out anyways.