What do i do with this gay guy?!?

theres this gay guy at school and he keeps telling everybody that he likes me.. every day i try to avoid walking in the area that i know he's going to be at because i just dont wanna see this guy at all.. but some how he finds me and starts up a conversation.. im not a mean guy at all so i cant just say stop talking to me ur gay im not go away.. so i just make up excuses and say that i have to go or something.. but this is getting pretty annoying and i dont want people to start thinking im gay!! I LIKE GIRLS DAMNIT! what the hell do i do?!