Welcome FreddyB. Truth is as Zoso says, only she can help herself. You cannot help or save her. All these things she is doing is not only hurting her but those who love her.
At some point you need to ask yourself when are you going to save YOU?
Enabling her only helps her continue her addiction.
You will never control her. Might be time to reevaluate the relationship. Just because there is a decent girl in there it doesn't mean she is even close to ready to come out.
How much more are you willing to lose?