PLS HELP ME VERY IMPORTANT?!?! PLZ I NEED TO KNOW?

sorry if this is kind of long but plz help....ok so like i think my ex still likes me but im not sure and like one day he kind of did admit it but like that was 2 months ago and then wen this other guy asked me out and i said no but my friend said i said yes but i didn't then my ex (lets call him dave(got that from Alvin and chipmunks so yeah lol)) so dave like really tried his hardness to tell the other guy that i didn't like him or want to go out and yeah and he is always trying to get my attention and bugging and lately ive been catching him staring at me adn today i was walking to lunch and he was walking behind me and trying to get my attention again and he was with some ppl that were in his last cl and turns to this guy and goes hey 'alvin' that's 'alicia' and points at me so that means he talks about me and so yeah.... so does he still like me??????? plz help and plz give some advice no real names were used in this