Why are middle schoolers like this? Especially my friends?

alot of them are looking for boyfriends/girlfriends. especially my friends. They all think im weird because i don't glom all over guys like they do. And then i hate introducing my guy friends to them because they always try to hit on them and hook up with them, and then they don't want to hang out with ME anymore. And now they are mad because i don't introduce any guys to them and they say im just hogging them to myself. I am just tired of losing my friends b/c of them. I luv my gal friends, but they are driving me nuts!What can i do to fix this, they won't even answer my IMs anymore :(