PLZ!!..i need help!!?

ok..soo...i neva new but a guy in my cl lkes me!!....but i dont!....he used to lke someotha girl in mycl but now he doesnt!!....i dont lke him but he is always starin at me!!...i am cared to present anything to cl!..i told him not to tell anyone!!..wat shaould i do??..plz help!!