Came I half way, I too had a similar sitch where W came back but said she was not attracted.

All I can say is it's going to be hard if you stay.

This is the approach I took:

1. I have been a push over, this is not attractive. Will stand up for myself.

2. Men that demand respect are attractive.

3. Sometimes unattractive is code word for boring, GAL.

4. Sometimes it's code for taken for granted. Find a rather innocent way of reminding W that other women may find you attractive.

5. People want what they can't have, make yourself a little less available.

6. "women don't like manly brutes" total NG lie, get in touch with your inner man, become rough and tough.

A wise and self aware woman told me this:

"women are attracted to men that can stand up to them, because it means they will stand up for them".

Don't know your whole story, but this attitudinal shift really helped me. The stuff in NMMNG is good stuff, use as much as you can.