Have you got kids? Spend every penny on the kids instead if you do.
Im struggling with a bit of a coke habbit. And i work hard and my kids get what they want 1st.
I was gonna say tell the lazy bastard get a job and pay for his own habbit but im not..
Id lay down some ground rules RIGHT NOW. He admits he has a problem, and he goes and gets help straight away. You tell him get off his back side and help out. And he has to apply for X amount of jobs a week. If not kick him out. Hes dragging you down!.
You havent been helping paying it for him, prob made it worse. But stick to your decision.. if he turkeys.. let him.. or tell him go to the docs. But he really does need to sort himself.
You have been wiping his backside for too long by the look of it. Be strong.. be firm.. and dont give in.