Are you sure you're not reading my mind? I have had the exact same thoughts & feelings, although the shoes are on the other feet in our cases.
Ironically enough, the last time I had sex was after a Dr. Phil episode back in Dec. 03, where he had couples on that were having sexual problems. My wife watched it and I think that some realization occurred about what the impact of a sexless marriage was to the partner who actually wanted sex. Unfortunately, the heightened level of awareness didn't seem to last....
I know it's small comfort, but at least your spouse is actively participating in the process of trying to solve the problem. I have twice gone to counselors, but cannot convince my W to be involved. Somehow, sharing the problems through this messageboard seems to help, even if it doesn't directly affect our spouses.