Well, assuming this isn't some hilarious Internet rib of yours...
"Bi-curious" might be the best way to define what you're describing at the moment, until you're a little more certain of your feelings either way. Be open minded about it yourself - a lot of people your age have doubts about their sexuality and begin to explore it, sometimes realizing they're gay or bisexual, other times reaching the conclusion that actually, they just have a higher appreciation for the same sex than most people but they're still straight. You've got all the time in the world to discover and come to terms with whatever that truth is.
As far as other people are concerned, remember that when it comes down to it, it's your business and they are privileged if you choose to share it with them. You needn't feel pressured to make any big declarations that you're not ready for. That said, cliched as it sounds, you've nothing to be ashamed of. As long as you're not actively trying to keep it bottled up, then you'll find yourself discussing it with the right people when it's most natural to do so. You already have a good idea of who you trust, and who it would benefit you to have them know and understand this part of your life and personality. It should get easier with everyone else later on. In this day and age, most people realize that's all it is, and that you're still the same person - for better or worse!