I'm late in welcoming you to SR Mazey. There are lots of folks here that will tell you it's suffocating trying to keep an addicted loved one from hitting their bottom. Some folks walk away, some don't. It's a personal choice and only you can know what the right thing to do is.
Here's a post from the best of SR forum that I have found to be invaluable...
http://www.soberrecovery.com/forums/...l-problem.html