It could possibly be hormones, they go bizerkk when your a teenager, but it could also not be. Take time and dont worry about it to much. I agree with Tayla as well. Try get to get to know the kid, who knows, he could also be experimenting or confused. Having friends who know about ur feelings can be major help points, for they can give you advice, and give you help. Im going through the same problem, and my friend helps me out soo much.
PM me later if you want, i would be glad to help. Hope I helped.