You broke up because neither one of you saw each other as a life mate (that's pretty clear because you weren't interested in following her and she decided to move).
At the point you both made the decision to split, she ceased to be "yours" and became free game. And no, why should there be a "barrier of time"? Some need it...but many don't.
Sorry to sound blunt but this is looking like..."I don't want her, but I don't want anyone else to have her."