what can I do about my friend?

I'm on a trip for national orchestra contest. Nobody really dislikes me in the group but my one friend is pretty much the only one who hangs out with me the whole time. He's pretty dumb but he wants to get with this girl in my orchestra. She is really annoying and so is her friend and I just don't like hanging out with them. There are these girls that I hung out with at state contest who I like hanging out with but one of them is gone for a race and the other is just hanging out with an all girl group. I don't know what to do because I don't really have anyone to go with and I went to hang out with my friend but I hate the people we are hanging out with. What should I do?