think this way: she is God sending and train you to be a complete human beings, who can bear most difficult circumstances. You have long life ahead and will have some more difficult battles ahead in life. Now you are weathered and prepared.
Forgiving her or not is not about her. It is not about your new boss. It is all about you - what kind of character, principle, and life attitude you want to be in the future. From what you described, your situation was far from the worst (JMHO).
