B's revisionist history will keep her distorting reality in order to justify her current actions. It is ok to be disappointed, but don't let it get to you. You know the truth.
You have owned up to your shortcomings and have used this knowledge to become a better you. Keep that focus and you'll continue to be ok.
As for the saddness, I completely agree w/what you're saying. I too find things that make me sad (or hear music, etc.) and get into my "mini-funks" over it. It is ok and completely natural as long as you keep these little down periods very little indeed.
Hang in there and enjoy S11 while you have him - broken finger and all.
