I have the biggest crush on him, but he doesnt know who i am?

i have this HUGE crush on a guy, hes older by 3yrs im in yr 8 hes in yr 11 now & since about sept. last yr i have had a HUGE crush & i cant tel my friends coz they go round blurting things out all the time, what do i do? i like go into another world when i see him walk past or when i just stand & watch him and i see him smile it seems so impossible 2 get 2 know him, coz he always hugs girls, but the really pretty popular ones from all yrs cept yr 7 & it hurts me coz i jus wanna know him, coz i know we wouldnt ever date, but i wuld like 2 no him how could i get 2 know him coz he doesnt even know who i am or my name someone give me advice apart form giv it time coz i ahve given it time & that hasent helped, it has only made it worse & me like him even more, if i c him talkin 2 a sum1 i'll find an excuse for goin in that particular direction jus so he'll notice me walkin past, i hav even found out his friends names, so i could like maybe, get 2 no them, then get 2 no him.--help me please!