Hey there,
I think that at your age, you shouldn't focus on labelling your sexuality so quickly. There are many people your age who are bi-curious, but may not be bisexual at all. They may be straight, or gay. Of course, bisexuality is a possibility. I guess what I'm trying to say is, don't be in such a big rush to figure it all out (although I know how much, at your age, you may want to know your sexuality asap!) Personally, I am 18 years old and am a bisexual, and it took me years to realize and accept it.
Try dating both sexes if you'd like, and see what happens!

Just have fun at your age, you'll figure out your sexuality in good time.