Ignore her.  Move on and live the best life you can.  Your life will improve...she may notice that the breakup didn't impact you and she realize what she is missing.  Also consider that maybe it just wasn't meant to be.  Were you happy and did the relationship fill your voids?  Are you just feeling alone?  Get out there and create another life....one more exciting.  Do things that you enjoy and who knows...you will probably meet someone else....exercise always helps...take action.