Re: Wife left me. Say's she loves me but not in love.
Do the 180 for you, not her.
Start living for yourself: work out, get in shape, go out to see friends without her, buy yourself a nice new wardrobe of a style you've never worn before, take up new hobbies, BE INTERESTING, for yourself.
Treat her like a college roommate. Be pleasant, positive and polite, but don't orbit around her waiting for her to say something. Do not ask her permission to go do what you want. If you have plans to go out, then go out, but don't feel like you need to wait for her permission. Get dressed up swank, tell her your going out and then GO. Don't invite her to go do things anymore.
By doing this you are breaking yourself free from her influence and emotional controls. She may feel threatened by this... or she may welcome it. The 180 will show you very quickly where her feelings towards you stand. It will either make her notice you and draw her to you, or it will justify her determination to break up with you.
Either way, the 180 will help strengthen you to accept whatever decision she makes.