[quote=Derpestein]
So I'm asexual and currently not interested in a relationship, and someone came up and told me they have a crush on me, but I'm not interested in them that way.Any advice?
[/quote]

There was a very good friend of mine who told me she liked me over text one night. I didn't feel the same way, but I didn't want to hurt her feelings or tarnish our friendship, so I told her I liked her back. All night I agonized over my decision and about how I lied to her about my feelings, and felt so terrible that the next day at school I ended up telling her the truth after bawling all morning because I was a terrible friend. 

Moral of the story: Be honest. You will thank yourself and they will too.