My guess is that she is 100% wanting OM, and 100% wanting to be with you. Hence the angst.
Your job is to detach from her drama. It's not your job to get her help or fix this for her. Stating your boundaries is the right thing to do...keep doing that. Let her know that you will help her in whatever way that you can when she commits to the M, but right now she's on her own. Trying to help her right now is codependent, and could actually provide her with the emotional security that she needs to make the break from your M.
You might want to read some Al-Anon stuff. If your W is addicted, you need to think about how to deal with addicts. Mostly you have to be very grounded in yourself and not allow yourself to be emotionally enmeshed with your W.
(((GW)))
me: 42 | STBXH: 41 | T: 18 | M: 10 | separation: Jan 3, 2010 | they deserve better: S7 & D4 current thread: http://tinyurl.com/3y8sxcp .: first breathe, then heal, then start LIVING :.