...clearly it was not a real friendship. It was a "friendship" of convenience because your "person" tossed you to the curb like garbage then years later came running back to pick you back up. She sounds like a really great person.
We often think of our friends as the family we got to choose instead of being foisted off like it is the case with relatives where you do not have a choice. But have you ever thought about what makes friendship such a great bond to have?