Also, since it IS your house, refuse to let him back in your house.. make it non-negotiable no matter who is DMing..
You also don't owe him anything beyond basic politeness in responding, if that. I'm polite except when provoked.. He's being rude, don't feel bad about being rude (and brief) back.
Don't let him walk over you any more than he has. I get the impression he's got some expectation that he can, based on the past (ex: muffin incident).. but it's in your hands to refuse to let that continue.
You also don't owe him anything beyond basic politeness in responding, if that. I'm polite except when provoked.. He's being rude, don't feel bad about being rude (and brief) back.
Don't let him walk over you any more than he has. I get the impression he's got some expectation that he can, based on the past (ex: muffin incident).. but it's in your hands to refuse to let that continue.