Like I recently told someone else on this topic...
The only one who can tell if you are bisexual is YOU. Only you can know for sure. But here are a few articles on the topic of bisexuality that may help you out.
link
link
link
Additionally, try not to think so hard about labels. Look around, talk to people, fall in love. If you find that gender matters, then you're probably one way or the other. If you find that it's more or less equally both genders, you're probably bisexual. If you find that gender doesn't really matter to you at all, you're probably pansexual.
Try and... as one of the articles is titled, fall in love with a
person.