I hate it when that happens. It's just another of the dreaded "Life Lessons" that you'll look back on and realize you're probably better off without her.
When you look back on it years from now you'll realize there were signs and you probably knew it was coming. She is ashamed of her behavior and that's why she did'nt face you with what she had planned before she took off. She'll have to face that someday. Karma
In my case it was the divorced friends telling her how great it was to run around like a teenager without the rules.
Let Her go.....She will come back on her own if it is meant to be, but don't wait for it to happen because it may not.
It took me a couple years to get over it but we have 2 girls. That was 1989. Today she is remarried as am I and she is still an unhappy person.
I am sooo happy I did'nt get back with her. Try thinking about it this way, Today you are very unhappy. It is a direct result of how she has treated you. I know it's easy to say that but who wants to be emotionally abused. That's what it is....Bottom line.
Watch out...If she knows you'll do anything to get her back, she will take total advantage of you and lead you on and on and on until you stop it.
I totally agree that you have to treat it like a business now. Cut your losses.
Nobody ever said life was fair. You gotta look out for #1, and that's you.