I'll state the obvious first. Pursuing doesn't help at all, as I know you've read it but maybe have not absorbed it or embraced it totally. It's easy to do and I've done it - thinking, maybe we can go out since I had a good excuse - my birthday, work friends invited me (us) out, etc. But my W was the same.
It's tough when you're looking your best and ready to go, but the H (/W) does not want to be with you. Someday he will or someone else will gladly.
Haven't seen the movie yet, but did see the Sex and the City episode that inspired it - which was funny - and sad.