i think it sounds like your real goal is to let this particular guy you're interested in know you're available (and interested) more than anything else. if you were to subtly flirt with this person, you might get your message across. once that happens, believe me, people talk...the others will know soon enough. now, if you feel like you want more control about what they're talking about, you can tell the people you trust most first.
in any case, i understand you don't want to be teased about your sexuality. no one should ever be subject to something like that. however, the fact is that it's probably going to happen at some point. it's not right, but it will probably happen. so be prepared for that moment. just know that it happens, and let it go. sometimes the younger you are, the harder it can be.
one of my best friends, a kid i grew up with, said it to me outright, and although i was surprised because of his age (he was just under 15 at the time), i really, really respect that he did that. he trusted me, and it was something i should have known as his friend. we were on an airplane waiting to take off on a month long trip to france together. then out it came! and we had an incredible time. i love him to death.
just don't do what tila tequila did.

you don't need to have a reality show before the truth comes out.