Why was my crush so harsh to me today?

yah he is probably just trying to get to you, he is jealous. Next time when he asks you bout you and Mike tell him straight up No i think i like you not Mike, you probably dont see it but i really Do. hey it will change everything but yah thats the way its supposed to be, you gotta do it or else no one will. Just tell him you like, there is nothing wrong with that, if he says No then move on that way you wont waste time waiting for nothing.