From what I see there's two ways you can go. You can either accept the fact that other people know and just tell them straight up- Yea I'm bi, so what? - A lot of people will respect you that way. If you get bothered by it they'll think of it as a weakness and you'll probably get teased outta your mind.
Or you can just say no. You shouldn't be forced into coming out if you're not ready. You can deny it. But the second choice will probably end up getting you teased as well.
Most of my friends who are bi or gay who have come out and just told everyone like it was no big deal seem to be more accepted than those who try to deny it.
>_<