guys,i am in ahuge problem.i need ur help.my crush problem

I like this guy but it looks like he does not......i am not sure.

I can cry.I have been crushing on him since the 5th grade!But he now acts sooooooo strange with me.The guy i liked looks to dissapear but i just can't get over him.Whenever i leave him alone he comes closer to me again.i don't understand.And now i know he knows a boy of his class has a crush on me!Will he ver like me again.I highly doubt that!Plz,help guys.I really feel deserted!