"She "naturally" knew it would bother me for her to tower over or look down upon me."
You're reading too much into this. She's doing it to gain back her confidence from being single again.
This is the attitude you need to have. Confident and in control rather than holding onto resentments based on her actions. It's the resentments that's eroding your efforts and turning you bitter.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.
