((((dogged))))
Welcome to Sober Recovery. To answer your question: you can't help him....you can prevent him from dragging you farther into his stuff which in the long run could help him if he runs out of resources it might make him get desperate enough to get some help on his own.
Read the "stickie post" at the top of this forum especially the one titled:
"what addicts do"
Keep the focus on yourself and take good care of yourself...