WW, I think you are seeing separation from your wife as a solution to your problems - unfortunately this is not the case, as I have told my xDSO, I did not cause his depression, neither did our relationship and seeing a solution to the problems in his head in something that is external is not logical. I may be gone from his life (very soon I think) but his inner world will still be the same. Think carefully on this and talk it through to the end game with your therapist. Ending a marriage or a long term committed relationship is not just about saying good bye, there are alot of practical issues to be considered, where will you live, who keeps the house, pays the mortgage etc. You may find yourself divorced and alone, but will that resolve your depression? I dont think so,
regards,
Erin