Do not keep on with a mockery of friendship after the substance is gone - but part, while you can part friends. Bury the carcass of friendship: it is not worth embalming.
Look, if you have somebody who doesn't have health insurance, who doesn't have a doctor or dentist, and in order to deal with their cold or flu or dental problem, they go to an emergency room - in general, that visit will cost ten times more than walking into a community health center.
