dude im like 17 and you're like 15.
i am now the person telling you that it's going to be alright when i was in exactly the same situation two years ago, and when people told me that i didn't believe them, so if you don't believe this i take like no offense at all, and if in two years (or more, or less) time you think "huh i guess he was right" i wont like come out of your closet and yell "TOLD YA" in a loud voice before disappearing in a puff of smoke, ill just be sort of happy for you.
the trick is just to try and hang out with girls more, which sucks bc it's hard if you're a nerd like me and all your hobbies are like, 95% male. so the trick is actually to try and not give a fuck about that, fail, actually give a fuck about that and then go out and do more hobbies anyway. ive expanded my group of friends significantly, went to my first con and taken over the school's chess club with magic the gathering in the last two years, and none of that shit helped me get a date with the girl i currently have a date with. except it did because it was all totally fucking worth it and made me feel more confident about my identity as a huge fucking nerd.
but hey apparently you're bisexual so some of this doesn't apply, im still a hormonal teenager too so i really have no idea how any of this applies to people who aren't me, let alone people with different sexualities.
the gist of it is that you should totally continue giving a fuck about all of this because it is pretty important IF YOU THINK IT'S IMPORTANT but it'll probably be ok. if you see like a chance anywhere to go do something that interests you where you'll know nobody and most other people won't know people either, it might be a good idea to go and do it.
i hope this late night ramble is somehow useful to you, dude