Navyguy: I know I will catch flack for this but at this point I can't help but wonder - are you being an enabler to your wife?
She has been given no motivation to change.
Depressed or not. Self medicating or not. She needs to wake up and work on that.
And the fact that she is obviously telling others of the situation - making it seem like it's your fault? I don't even know what to say to that.
Imho... I think now she needs to fall on her (face) own two feet. Then she can really see what 'reaching the breaking point' is all about.
I don't mean to sound harsh. But as a past substance abuser (from the age of 12 to 25!) I didn't wake up and find a proper solution until I *HAD* to. Until my face met pavement.