On the FB DB site , Michele posted something about how the qualities we looked for and were so wonderful in the beginning are not, maybe what we want now. But that change can happen.
I am not really sure how you should go forward with this. On the one hand,W seems to need a lot of support from you and has come to rely, it seems, on you to snap her out of her moods. But going back to that didn't really work, since you are here, even though you profess to stuff (oh ya...LIFE) getting in the way.
How about ignoring the petty things, letting her work through her own depressive thoughts and being the fun guy elsewhere? What can you suggest in terms of where you can let her see that you are the fun great guy, but by not responding to picky ways, you are not further validating the actions?