Hi Jare, I wouldn't worry about it too much. Personally, I feel that if you're not physically attracted to guys and don't have any romantic feelings towards them, then you're not actually gay or bi. I suppose you'd be what they call "bicurious." When I was at university people were still unsure and experimenting in their late teens early twenties. For example, there were the LUGs. Lesbians until Graduation. I don't know what the lads called themselves, but it was fairly common. At your age I wouldn't be too keen to stick a label on myself anyway... labels can stick, and you've got a lot of growing and changing to do.
I've changed an awful lot in my life, from the girl who was secretly in love with my best (girl) friend, and used to lie in bed at night dreaming I was a boy, and could show her how she should really be treated... I'd fantasise about how she should be kissed, and what kind of flowers I'd buy her to put in her hair. Since then I've thought I was a hundred percent lesbian, then bi, then a hundred percent straight, and right now I have no sexual desire. It doesn't matter. Just whatever you do, don't stick a label on it, and do be safe. Regarding virginity... it's a precious thing. I hope that you are able to exchange it with someone you love.