And remember that detachment is an emotional state of mind. It means that you are not controlled or affected by her behaviors. It doest mean you are cold or cruel to her. You can be pleasant when you see or talk with her and that WILL happen again. In order to fully realize YOUR full potential, you must detach. You can't do that if you are constantly worried about her and her feeling. My W has never told me that I need to do or be x, y or z. I just did it. I figured out what my faults were and started changing them. Not to win her back but rather because I wanted to be a better person. These changes will continue whether I am with my W or not because its how I can be the best person I can be. That's what you need to be focused on right now.
Me: 48 y/o W: 47 y/o Together: > 20 yrs BD: Dec '15, then S 2nd BD: Mar '16, then I filed for D April '16: started piecing