Couples Therapy is for couples, Nail, and this is not you at the moment.
See the doctor, ask about ADs. I have a theory, and it is only a theory mind you, that creative people are most prone to depression, more so than others.. I know I write best when depressed and it seems as though you are a musician, another creative being. That which allows us to create and "see" often has a price.
We, as women, do want heroes. Not all the time, but it is nice not to have to be the strong one, every once in a while. The lack of emotional intimacy on H's part (and mine) has led to this state in marriage, so whatever person your wife protrays, there is another one hidden inside (her letter is proof of this).
You need to GAL and begin DBing, because you really haven't started yet. Start yourself with less contact with W since you cannot seem to control emotions yet.