Hard to say. Detatching is often for your good. It helps you ride out the MLC.
With a WAW, the strategy will vary.
Experiment and monitor results. Does being less available for her, let's say for 1-2 weeks change things in a positive direction. Does drawing some boundaries make things better or worse?
Boundaries are also necessarry for you. You see, even Jesus had to get away from the crowds that demanded his attention to re-charge and get perspective. He was God, but his humanity, which we share, was not inexhaustible.
It also sounds that your wife needs to see a counselor for herself. Not couples therapy, but one-on-one. A grounded, pro-marriage counselor (who won't tell her to punt the marriage so she can self-actualize), who can help her with her depression, suidicial thoughts, eating disorders and possible bi-polar issues.
