As a female I can say, what a bitch.
But an advise for you, just move on, ignore her completely, no rebounds. Just try to put in your head that it is over, you are done with her, there are no way you will ever get another chance, I know your ego got hurt, but it happens to all of us.
And do not come out as desperate women sense it, just be yourself. Do not mention your break up, or your ex, do not mention how it happen, who left whom. Always remember you do not want to start anything new lying, because no one tells you the full truth about the previous relationship, just cut out the subject from future conversations for sometime.
And you already starting wrong, if you want just to get some action it won't get you anywhere.
Learn what you really want first, and find women who want the same. If you want just sex, find someone who just wants the same. And we are living in the virtual age now, go on porno site and masturbate.
Good luck!
Lady/Devil best of both worlds