I think the answer is not that simple...or very simple ... part of it depends on your age. If you are not yet 17/18 then you have a lot of maturing to do and I'd give yourself time to go through the hormonal changes.
If you have always been attracted to other guys and never attracted to girls that's a good sign you may be gay... Please contact me if you want to chat.
It doesn't matter wether you're gay or straight, it's how you deal with it that matters.