We can only do so much to help. They've got to take responsibility, and want to change, and all that.
My stepdad's an alcoholic, and he tried to quit for a while, but now he's back at his old habits. I still care for him, but I've stopped trying to help.
"Writing is like prostitution. First, you do it for love, then you do it for a few friends, and finally you do it for money." ~ Moliere