How do you deal with younger guys liking you and you have absolutely no attraction to them?

I'm 15 and I think this 14 year old likes me, and it might be cute and flattering if not for the fact that he's probably 5'11" and I'm 5'7". It's not like he's really immature or anything either(well, no more immature than guys usually are) but it's just a *little* awkward. PLZ HELP!