you tell him
Ask them...
If you don't know you like a guy, it means that you just don't like him or you just friends. If you like him you should know.
Ask him.
I'd have one of my friends ask him. And if he said yeah and was serious about it then I'd have her or him tell the guy that I like him.
Tell her the truth.
Just tell him.
lover
if you like him, tell him, if you don't like him, especially tell him!
tell him, because he want know so he will move on in his life
Write him a note or tell one of his friends to let him know that you like him.
My suggestion is to find out if he is gay first. Then get the courage to get to know him and things will follow.