It's ok, it might just be a phase, as it is just one person. It's normal for teens to experiment or have random unexplainable 'crushes'
-And if you do have feelings for someone, why must you slap a label on it?
It's the 21st century and there's no need for people to be categorized into 'Gay' or 'Bi', Just be yourself, and see how things turn out, there's no pressure to decide just yet, so you may as well carry on as normal and see what happens, chances are it is just a phase and you will come out the other side just fine!