In your "vent" you touched on your anger, which is good. I reckon this is a different anger than the initial anger you felt...use this anger in a constructive way, not as a means to resentment and bitterness (DO NOT allow those evil twins to fester)...but rather to
Take her off the pedestal you maybe put her on.
You know your contributions to the M issues, and you know hers...that she chose (POORLY) to leave rather than seek MC or IC says something about her...no?
Feel the anger, feel THROUGH it, then let it go....for YOU and S...then for her.
T^2
In the depths of winter, I finally learned that within me there lay an invincible summer. - Albert Camus
Uncertainty is the very condition which impels people to unfold their powers.-Eric Fromm