Whatever "Sun King", you guys had a fling and she lost interest. Yes, it sucks and is annoying. Girls do it to guys all the time. Guys do it to girls all the time. It's the wild west of dating. Don't call or contact her again and move on. If you see her out act indiffirent and non-committal if she tries to make plans. Now, if you acting unavailable gets her to ask you to bang her, go for it but revert to your indifferent self afterwards.
TL;DR: Get over it and move on. There's plenty other talent out there.
TL;DR: Get over it and move on. There's plenty other talent out there.