You are correct about not being able to bring up depression. I made that mistake early on. Only after 1 month prior her saying that she was either stressed or depressed as the reason for her distancing. But when I asked larer on and eluded to depression she got really angry and said "I am NOT depressed, I am unhappy in this marriage!" Best to stear clear of talking with her about this. It doesn't seem to go well.
M 37 W 36 T22 M14 D8 D4 8/2012 distanced BD 11/2012 (likely wants D. Feelings have changed.) W move out date: June 8th.