This question is dumb because if you thought he was perfect why wouldn't you like him? He ugly or something? lol If he's perfect for you I don't see any girl rejecting him to the friendzone.

If the question is "If your guy friend likes you but you don't see him that way, what should you do? Then obviously you let him down easy. You can't force yourself to like someone if you don't.

Be true to your feelings,yourself and him as well!
Just state it truthfully like it is!

it'll be unfair for him if you say yes. you can't "force" yourself into loving someone. it takes time and may take too long. ; n ;

If there is no spark, there is no spark :/ From experience I understand this all too well. I have a good friend who is amazing, but there is no spark from me so I always have to decline him, no matter how tempting it is just to say yes and accept them because you want to make them happy.