The non-addicted person is the one that wants change. If you want change, you must make it happen.
He likes things as they are, why would be want to move?
His brain is overcome with drugs. Drugs turn our loved ones into Zombies. That zombie has no interest in anything but feeding more drugs into the body so it can continue to exist.
You are not on drugs and do have the use of your brain and the ability to change. Yes, it is extremely hard, but you have your wits about you in a way that he does not today.
When the situation becomes to much to bear, you will find a way to change it.