If the situation has truly unfolded in the way you've described, I concur with what most here are saying.
Personally, I believe that if she comes back to you and you take her back, she will do the same thing to you again; as she will realize that she controls you. Perhaps if she tries to make contact again, you might consider calmly and politely informing her that SHE blew it with YOU, you've moved on, and you don't foresee a reconciliation. Wish her well in her future life, then end the conversation. Handling it in this way sends her a clear signal that she has NO control over you. Yeah, it might be tough, but you'll still have your self-respect.
Personally, I believe that if she comes back to you and you take her back, she will do the same thing to you again; as she will realize that she controls you. Perhaps if she tries to make contact again, you might consider calmly and politely informing her that SHE blew it with YOU, you've moved on, and you don't foresee a reconciliation. Wish her well in her future life, then end the conversation. Handling it in this way sends her a clear signal that she has NO control over you. Yeah, it might be tough, but you'll still have your self-respect.