Hi Steve,L
Sometimes the most helpful thing we can do is let go ... and let them suffer the consequences of their choices. Most of the addicts stories i've read here only got better when they had no-one or no-where to turn and they'd finally had enough of the life they were living.
Setting boundaries will save your sanity! It's not easy at first, but you start to get better in time. We can still hope and pray they get better.
My ex-H was the addict in my life. I supported him through jail, 3 rehabs, then prison.
He still went back out... I finally had to let him go. He called wanting to come back for about 6 months , and as painful as it was I had to tell him no, because nothing had changed and I just could not go back to the life we had lived with all the chaos.
Keep reading and posting... it will help you so much as you walk this path of deciding what to do.