You can give him signs not big ones but he should click in after a while give him personel quizzes about you and him and he should get the point.
Tell the truth & let him know how you feel.Then see what happens next.The worst that could happen is he rejects you.
Yeah
From what i Understand of "De-crush". If you want to decrush a guy, when he has a crush on you then you should tell him as soon as possible. You should let him know that you know he has a crush on you, and that right now you are not interested but can be friends etc. The more time you leave it, the more painful the result will be. If however you meant that you have a crush on a guy and you want to stop it, then simply put it aside and think of something else. lol
http://www.wikihow.com/Know-if-a-Guy-Likes-You
happens allthe time
Let the lovers love
I would slowly let him know! Take it easy!
Ask him!
Let him know how you feel... will make it easier on him in the end
Let him know, If he likes you Great, if he doesn't well just know that God has something better for you because it could go both ways.
asking him would work
get to know him then he won't be shy