Killer crush!!! Hey ppl, im crazily infatuated with a guy who's a lot older n i barely even know him...?

but i can't get over him since i come across him almost everyday. I tried it all...everything from avoiding him to looking for some1 els and stuff im still 16 i know u ppl will tell me that its just another crush n such sort of things... but its been really long since i'm having a lot of trouble getting out of it n m ruining myself.. i cant deal with the amount of stress n if theres anything in my life, its only questions!!! i also feel that he likes me n stuff but may be its jus me! I cannot avoid him or anything n m **** nervous around him.. plz help ppl... i keep wondering... what is it that i lack??? i mean im not bad looking or stupid or anything but i jus dont know... what do i do?? i'll b grateful if ur answers will make a difference...thanks in anticipation!! jasmine d'mello