How do I know if he likes me?

I felt the same way when I was your age. I tried to look very carefully, but not stalker like, when this guy would try and be nice to me like give me a compliment or something like that. Sometimes you can see how he reacts with other girls. If he acts nice to every girl in your school, he might just be a flirt, but... If you see he really gives you great compliments and whats to hang out with you a lot and the little things like that. You can kind of tell when he likes you or not. You can also sometimes catch him staring at you when he really starts to like you. WISH YOU THE BEST! HOPE THIS HELPED :D