Hairdog,
Reading your entire post reminded me so much of my H, in terms of his horrid level of avoidance. We all know that ended in him making the ultimate avoidance move: leaving.
I sense in the tone of most of your posts that you have a lot of anger. If you don't get that out, you may be on a very bad road. You know, the whole depression is simply anger turned inward saying. Depression can sneak up on you fairly quickly and then you will certainly be in no state to work with your W on this issue.
I really think you addressing this with your W, head-on, is so critical. No emails, no notes, no cards, but face-to-face. Don't be a wuss! Talk to her! Nothing is ever going to change unless you get angry and confront her. Or, you could just up and leave. That also seems to be a popular option.