Remember that what ever you do, what ever DBing you do, you do FOR YOU.
That said, if your W is MLC (and it sounds like she could be), then the NC is unlikely to have any positive affect on her (ie. that she'll "miss you" in a significant way). So that said, be sure that the NC is FOR YOU, to help you detach. Otherwise, it might be a better idea to just be as detached as possible, yet still "present".
Get back to working on your detachment and also your GAL. Those two things can help bring up your PMA. Also, take this time to work on any 180s or growth that is valid and for your future, whether the M is saved or not.