Lex,

Sorry I didn't see this sooner, but honestly, this doesn't sound like a good relationship. He's way too immature. He needs to be on his own and get a dose of reality. That is, if his parents don't bail him out again. I'd say, let him go shopping and do the math himself, but it affects you, too, so that probably isn't a good idea. He'd likely spend the money only on things he wants, and then complain that you didn't give him enough money (for more stuff he wants, not stuff that would benefit you both).

I'm sorry, but to be frank, I think you should dump the little boy, and get a man.

My mom still thinks you get colds from the cold, too, no matter what I tell her. And when I give her information, she doesn't believe me until someone else tells her, and she'll act like that person is telling her something she's hearing for the very first time.