Help My Friend

Back Story:

A guy, lets call him Dave, is without a doubt addicted to weed. I didn't think its possible, but it is. Dave gets mad if you don't smoke weed with him, Dave rummages through other people's rooms when they are sleeping to find weed, No one lets Dave roll blunts or get anywhere near their sack because Dave always takes a nug for himself.

Dave has started fights, fist fights, over not smoking him out. Dave, also, has no job and never has weed to throw down. When Dave does have weed (which is when Daves mom has him go to the store and he gets money out of the ATM with her card, without asking), he says "its personal" and never shares. When people do smoke Dave out, he complains about it. He says he could of got better, that its not getting him that high, that the blunt wasn't rolled good enough ETC.


Now:
Meet my friend, lets call him Tony. Tony is Dave's brother. Tony understands and knows all this about Dave. Yet, sometimes he feels guilty because he says its his brother. Tony is a hard-worker, yet is tired of his weed going to Dave's addiction. Tony will feel guilty if he doesn't smoke out Dave, yet when Dave isn't around he admits to hating it.

The fucked up situation is Tony and Dave's parents get mad at Tony if he doesn't bring Dave along with him. Dave really has no friends at all, no one likes him because he lies, complains, and doesn't know when to stop with things.

Tony wants to stop smoking out Dave, yet Dave is always around. Dave follows Tony pretty much everywhere throughout their house and expects Tony to smoke him out. If Tony doesn't smoke out Dave, Dave goes and complains to their parents. Who get mad at Tony, and threaten to call the cops on him for having weed. They are all adults, Tony is twenty years old and Dave is nineteen.

I keep telling Tony that he should stop, tell Dave to get a life, get his own friends ETC.
Tony listens and understands and agrees, but feels guilty about it because its his brother.

What can I say to Tony to make him understand because I feel terrible about it and I hate seeing my friends in situations of hurt?

 

Dave's had his ass kicked, he got his head smashed through a door and down a flight of stairs one night when he got drunk at a party and Dave's older brother whooped his ass once.

He just makes excuses why he would of whooped their ass. And acts like an even more hardass.

And yes, Dave is 19. Tony was going to leave one night to go to this club our friends just opened and their parents were going to disconnect the cable to his battery on his car if he didn't take Dave.

 

Tony is trying bro. Some people money is a big limiting factor.

 

You try telling your brother, blood brother, to go fuck themselves bro. I know I couldn't do it.