Stop right away giving him money Kate. He knows you will and will use emotional blackmail on you. Just stop that right away. If he needs some food but him some. But don’t get to the point we’re he spends all his money on coke then expects u buy his food. Tough love is now needed. And ye it is hard.
I’d sit him down and have a conversation with him. No shouting or anything like that, and ask him does he want help to quit. And get some help. But you can’t support him anymore and it’s breaking you.
He really does need to want to admit he has a problem and want the help. Otherwise your flogging a dead horse.