I agree it was a temporary minor set back just remind yourself how far you HAVE come and how self reliant you are.
As long as the contact she initiates is on a chummy how are you level ignore it, but if for some reason you ever reply to her tell her that you really aren't interested in anything short of her wanting to be back with you since you did get along in your relationship. BUT IF she ever did say she wanted back I would also make it quit clear that you wanted to talk everything over like how serious she intended on it being and means it, etc..
