Patience is key.

Be patient, she is not going to come back right away. she still has her doubts about what happened in the past but if you play cool along the way, good things are bound to come. if you are thinking she doesnt notice by like running back to you, she is noticing, its a wait and see game for her. Go into talking with her with no expectations and not be afraid to get ur heart broken again(very hard). And you may surprise urself and her.