If you successfully detach, you'll be able to see things much more clearly and you'll recognize the breadcrumbs for what they are. Focus on that.
Don't bring up the R. She'll have to have a complete change of heart before things can improve. Otherwise, you're just wasting your time and effort. Focus on you. GAL. Gather strength and rise up. She'll take notice of the new you and she'll wonder what happened. The mysterious thing works. My WW is always trying to figure out if I have plans with another woman or if I am dating without telling her.
Don't wait. You have the gift of time. Invest all of your time and effort in you. The dividends will be well worth it and they will help you to rebuild your self-esteem.
Finally, be patient with yourself, it took me four full months to pick myself off the canvas.