I honestly don't think you're ready for MC because you haven't felt the need to forgive yet. You're still angry and hurt and have put all the onus on her being the one to change. You have those expectations that you aren't willing to loosen that she has to meet for you.
The problem with that is you should go to MC with a clean slate. Not saying you forget what happened, but that you are willing to start anew and be open minded. Open minded meaning that you accept her for the way she is right now and that she is a person willing to change.
If you make it all about getting back at her or that she has to prove stuff to you, it will fail because nothing will be good enough for you. You have to have the faith in believing that she could very well be trying as hard as she can and let that be good enough for you.
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.