I know people get like this with weed if it comes to it just tell him to fuck off and just toke on your own if hes gonna be a cunt.

Just say you dont ASK for their weed you get offered it and its up to YOU what to do with your weed and no one can tell you, and if they wanna say your stingy because they share theres with you and you dont share any, then you can just say, everyone smoke their own weed then and dont share it then you haven't got a problem.