She became silent. There were no longer any words to describe the absence of emotion within her heart. She went from arguing to being upset, now feeling nothing at all. She became silent because you were no longer worth fighting for.
I would change this: I am not sorry for caring, for trying, or for any of it at all; although, now that I sit back and think about it, I am sorry it took all of this for me to learn such a large lesson.
I've never had my heart broken as badly as you did. Being wrongly accused of terrible things hurt like nothing else that's ever happened to me. My heart has been beaten and battered by the man I love most in the world, and still, I can't hate you.