Should I initiate being affectionate with her once again or should I just tell her I am calling it quits and moving on with a life without her. I hate the latter but it at least seems to get her attention.
If you are only telling her that you are calling it quits in order to get her attention, then stop it. Say it ONLY if you mean it. Say it only if you have: 1. Already contacted an attorney. 2. Have immediate plans in place to protect your assets. 3. Depending on the ages of your kids, have plans in place to effectively deal with the fallout of a divorce that will affect them.
And yeah, read "No More Mr. Nice Guy" by Glover. And do the exercises. Time to stop falling on your sword.