to know if a guy likes you he'll always look at you right out the blue or send you a random text message also he'll kinda pick on you just a little and call you little nick names some of them might...
Try giving him hints that you like him and see how he will react. If he acts in a digusted way, then forget it and move on. If he acts like he flowing along with you, and he's the one that's trying...
Observing things helps at this point of situation. Just observe whether he has no problem when u are around him or when you try to 'start a conversation'. Is he okay with it or his expressions might...
well that happened to me im in middle school and im 11 and i like a boy but im afraid to ask him so maybe you could tell him yourself or ask a friend to