Mind reading is hard of course, but what's clear is that she doesn't want to respond. Why is the question. And I wonder that a lot. Maybe interacting with me makes her feel guilty or miss me. Maybe it just makes her mad. Maybe it makes her sad. I don't know.
I can totally get that. Been there, done that. How are you interacting with her? I mean, look at it from outside of your box as an impartial observer.
There are moments in this life when you are so confident in the rightness of your actions, that not even for a second do you consider the option that you might be wrong.