I need to unlike this guy, because liking him is causing more harm than good. How can I if he is my friend?

Friends don't make you feel bad. Get this thing out into the open. Have the courage to tell him how you feel, it's all or nothing at this point. He's either going to tell you he feels the same way, or he's going to say he doesn't. Either way the games have to stop. From what you've said I would say he is playing games, which is not fair to you. Have the courage to talk to him, this thing is driving your crazy and needs to be resolved.