Hey, We all have ups and downs and we are all going to make mistakes. That's why God put erasers on pencils! If you are getting to that "point", that means you are detaching and once you have, you'll feel better about things because you'll not allow her antics to get to you like they have in the past.
You'll get there...it just takes time.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
