[orthodoc]

But this really isn't about losing a friendship over money; it's about being used by someone who's an addict. Medical or other marijuana, he's using to the point where he's willing to overdraft his account, lie to you to get money for more dope, and now to renege on plans and promises made such that you're left unable to make it to the end of the month. If you hadn't already invited the older gentleman you could have just declined to buy sides and eaten the ham by itself (and by yourself) - not a happy outcome but better than meeting his obligation and then hurting financially.

The main issue is that Charlie's mooching and using you won't stop; it'll only escalate. Unless and until he gets his addiction under control he isn't capable of being a friend.