I am sorry you are struggling with this, and that it seems nothing has changed with him.
The God of my understanding does not want us to be miserable but to be joyous and embrace life. I don't pretend to know how God thinks, but it strikes me that He would want us to stay away from the darkness of addiction, even if our loved ones are trapped there, only they can choose to leave that place and we cannot drag them out. It doesn't work that way.
Sending hugs this morning, and hope you find peace with whatever choices you make.
Hugs