I hope you got what you were looking for out of this.
When I read her writing, I see a sad, scared, beaten down person. But I see a lot of anger and resentment as well. I believe you read her absence as indifference, and that is NOT what I read. If your goal was to reconcile, I believe this got you farther away.
But what's done is done. My advice going forward is to truly drop the rope. Fall off the face of her Earth. Keep working on you and you never know what may come.