Depends on the nature of person.

  • Some people realize their mistakes.
  • Some people take it on their ego and want their pet back.
  • Some just want to keep you as a back up option.
  • Girls usually do it for two reasons.
    • Back Up option
    • Love relapse
    • Ego is not always an issue with girls.

In any case make her double the work to get you again.

How do I stop blaming my defects and inadequacies for which my girlfriend rejected me?