I think I like my best friend?

I think I like my guy friend more than a best friend.I'm prety sur he likes me to but he's rely wierd.He likes to pretend he talks like an alian and the two girls he went out with sepretaly were the girls in the school thought was wierd.What can I do?I know ppl can't change other ppl.Or can they?Help meeeeeeeeeeeeee.