Why do some boys look at you then look away quickly like they dont want you to see them looking at you are they nervous or embarrassed?

Well because if he is hanging with his guys then he dont want them to know that he like you know. Like they catch him looking at you they will like starting bagging on him about it. like ''(crush's name) like ( your name) then i have a few Words for you move to a different school trust me you do not want to be the telking statment for the WHOLE school.