Many people go into a period of bicuriosity, and so I think that may be where you are.
I don't believe that acknowledging someone's attractiveness makes you attracted to them. I'm about the same. I have always been attracted to men, but definitely know when a woman is hot. does that mean I'll do her? Maybe. But so far as I know, I'm straight. ... Or, my preferred term, heteroflexible. <3
It doesn't have to be clearly cut; ambiguity is okay. It may be best to not decide now and just go with what you feel later. You may feel an attractin to the right guy, or you may find someone who is inbetween! ;) Proclaimed sexuality is arbitrary; don't follow society's pressure to categorize yourself if you're unsure- you're more "normal" than you think.