He will stare at you.. He will compliment you.
Or maybe he will be incredibly rude.
It's not the best way to tell the guy that way, but lots of people do that everyday believe it or not.
"I like you"
You can tell him anything and you can act any way around him even if your friends are watching.
The same way you would tell any other guy! Ask if they want to go to the movies sometime, tell them you want to spend more time together or give them your number to see if he responds.
no way
yes in way depends on how he said it
Only sure way is to ask him but he may not tell you the truth.
you could tell by the way he acts and how he is around you like flirtting or all on you ASK HIM!
There is no reason to answer any other way then truthfully, if you like him say yes if not then just tell him you are not interested in being his friend.
The most accurate way to find out is to ask him.
No.
just start flirting with him and then tell him straight up you like him and see where it goes