I have this hugeeeeeeeeeee crush on this guy at my school and he is friends with a person I used to be friends with, I like him so much but I don't know if he likes me back, what should I do?

Bad idea to like someone and they don't like you back... you might have a crush on them but they will crush you later.

I've seen all my friends end that way

Move on and find a new one... I know it seems to hard but just slowly move away and then maybe he'll chase you back!