He liked me, I liked him. Now He Doesn't Like Me Anymore.

My situation is so frustrating.

There is this guy and we have been friends for ever but he moved away. Recently he came back and we have become friends again.

I didnt think anything of a relationship between us until one of his friends said he liked me, and immediatly after that everybody was telling me to ask him out, he likes me. All that stuff.

And i started liking him back and then one day he was really awkward and started flirting with all of my friends, of course they showed him up but now he doesnt like me.

I'm so confused cause i still really like him.
I dont know how to get him to like me again?

Help!