Why wont he talk to me????????????????????????????…

i dont even no wat i did al of a sudden he wont say anything to me then when my friend asked him why he said he didnt no i think its a crock of bull s**t but idk no i only talked to him a couple days a week and it doesnt help that we go to seperate schools but at first he would talk to me every time i signed on but now he wont even say hi or anything i am so confused can any one shed any light on this situation? please any suggestions would be accepted