Many families grieve the person long before they die — through the disappearances, the lies, the versions of them that came and went.
There's often relief, anger, and shame in the mix, and stigma that stops people offering support they'd give freely for any other illness.
You couldn't have loved someone out of an addiction. Nobody's love has ever been the deciding variable.
Grieve both people: the one at the end, and the one you knew before it.