You've got to give it time sweetie. You've not been in school even two months yet. Don't worry so much about these things, they usually have a way of working themselves out. In the mean time, if you would like to try to make more guy friends or be more outgoing with them than that is a great idea, as long as you are doing because you genuinely think that they would make great friends, and not for the sole purpose of finding a boyfriend, because you will never meet the right guy that way.
A little flirting is fun, but remember that you should enjoy all of highschool and not just the boys there otherwise you'll miss out on a lot.