My wife has not initiated sex in more than decade. When we do have sex (scheduled once every 2 weeks), I have to make all of the moves. It seems like that anyway. The problem is partly in my brain, though. I did not really understand until I saw the Sexed Starved Marriage video. We bought a great book on the same topic and have been working on it. I can tell you that it IS possible to rekindle a sex life. Takes effort, communication, time, and willingness to make mistakes.
Good luck