You take into account how he acts around you whether it's sort-of distant actions or whether it's sort-of not distant actions such as not wanting to hug you, or being blunt when talking etc., there are many signs and it also depends on the guy.
tell him
I will tell him to stop,or i will like him back
yes
I tell him that the guy I'm about to kiss is the guy who behaves and looks like you.
you either tell him who you like or give him some cash.
I tell her the guys name and I say I like him
Ask him
you tell him.
You can tell the guy you like him, but you can't tell anyone or nobody can't see a part of love
you tell them there a really nice guy but you dont really like them
Find another guy to like.
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.