How to I tell a guy I dont like him?

Just tell him plain out that you don't like him, and don't wanna be with him, or go out on any dates. sometimes, i find anyways, that you have to be pretty direct with guys before they get the message that you're not interested, just be like hey, i think you're a cool guy and all, and i wanna be friends. i just don't want to date you right now. that should get the message to him, and it was not a mean way of saying it. good luck!