real easy, solution here. you dont have to be a dick, just simply tell the dude that ur always busy or doing something today or hangin out with ur girl, something along those lines. real easy. hangout with the dude for a short amount of time once in a blue moon and slowly just do not answer the phone or tell the guy ur busy all the time
well you can shit on his door step and wait for him to open the door. the key to this is you have to wait for him to see you, so stay there. he'll open the door and see the shit, thats when you glare at him. after glaring for a while, slowly walk away and look him in the eyes over youre shoulder every few seconds. if this doesnt send the message, then i dont know what will