Urgggg please help me!!!?

ok i asked this guy out tht i rly liked and he had this rly nice way of saying no and then i got over him in lke a day , and he the p two weeks tat i asked him hes been acting differently , and just now i told him hes been asking liek a jerk sorta and he said he doesnt give a $h** anymore and hes a screw up and when i asked why he said nvm. and i need to know and now hes not responding... pelase help!!! he goes to my school so dont think i dont knwo him.