Only you can tell if you are.
You don't say what age you are but it may be
just a phase some young teens go through then
find a girl and you forget about your teenage years.
Doesn't mean there is anything wrong with you if you
continue to explore your feelings which ever way you do.
Your sexuality is a non-issue as far as I am concerned. We are what we are -- born that way and unable to be changed. People who say that they are bisexual are just fooling themselves -- Whichever sex they prefer dictates what they can "call" themselves. It matters not . . . you can have sex with your hand, and what you are visualizing or fantasizing about to achieve orgasm pretty much tells which way you are leaning.
Just accept yourself and if guys turn you on, then go with it. You could try getting into a relationship with someone(gender) to whom you are not attracted, but that would only waste everyone's time. Would it not?
There is no harm or shame in liking those of a like gender. It's not like you can control who you are attracted to.
RELAX, and just do what feels right. People put too much stock in labels anyway.