My best friend likes me

Hey everyone!

I need some advice!

You see I have been friends with this guy since elementary where I later found out he liked me in graduation of high-school.

I like him as a friend but I whenever I think or see him I feel happy. I also see him in the future but I don't want to be with him. However I don't wanna have this feeling towards him even tho I think I like him.

How do I stop liking this person!!!