Tried councelling several years ago without success, became out of bounds after that. Any mention of the topic of our sex life is liking asking to be hit on the head with a hammer - no real point to the pain.
Seems like your wife may also be ducking the sex issue by being too busy for counselling and erasing the Dr. Phil tape on the topic. After one and half years, when does she think it would be a good time to work things out with you? I wonder if she is related to my wife?