Awwwwww, the dreaded bi-sexuality card has been played on the table. My apologies, I don't presume to say you are bi-sexual.....but it paints an interesting picture as to where you go now. In my own experience, I always "kind of" had a thing for guys but I didnt know what to make of it. I found them to be more interesting then girls and have a better body frame for at least what I liked to label as "eye candy". When I look back, I had a girlfriend when I was 16 yo that didn't end on the best terms.....I had issues with throwing up LOL but my actual first day of coming out and admitting to the world that I was gay happened in November of 1997 when I was at college to one of my closest friends who just happend to be gay. Shocking I know!
I think the only way you will know for sure is to try. If you decide you want to I think that you shouldn't be in a relationship with anyone nor do I think you should try to "hookup" with anyone either. I think you should try to meat errrrr meet
someone and see if you actually like the aspects of them through casual conversation and even some flirting. If you meet for a date and enjoy the aspects of being with a guy then try having another date or go for the bedroom if that is what you desire. Just be careful and be sure you know what your doing, some roads are difficult to come back from if you aren't sure you should be on them in the first place. Do you think my parents would react oddly if I suddenly walked up to them and said, "Mom....Dad.....I'm not gay anymore!" They would probably have me committed to an asylum.
Just make sure you are happy, do whatever you want to do but make sure its what you want. Don't be afraid of anyone else or hold back your true feelings whether gay, straight, bi, etc......
Nate