I want to be desirable to her again. The truth is, it does not matter to me what she does on her current path, I would go back in a heart beat.
That sounds more like CO-DEPENDENCY to me than LOVE, Loveher. That's not healthy. A good read for you after reading DR would be "Co-Dependent No More."
And strategically, you will only be successful in this if your wife feels a credible fear of losing you. If she knows she's got you hanging on like a puppy dog on a string (ok, I'm mixing my metaphors here, lol) you will NEVER be successful at attracting her back. She has to think "Oh cr*p -- I went too far. Loveher seems to be moving on without me!"