I hear you! Let's think of this.....think of your love for one of your angel children, like that 3 year old!
, now multiply that love by 1000. Dd7 is one of GOD's beloved children and He loves her with a love we cant imagine...except by using our human love for our lovable kids. He doesnt want to give up on her. Dont worry about YOUR love or lack of love for her.....just be thankful that we have a God who loves her perfectly. Forgive her for yourself, and for her sake. After reading the powerful novel The Shack recently....I decided that i really didnt want to be unforgiven as I chose to not forgive others. I want that forgiveness for all of us...not just for myself.
It is hard to do so sometimes. But God is good. Let Him love you and let Him love your dd. Do your best to be compassionate. My dd's rarely make me happy and have caused me much pain. They have exposed my enormous HUMANNESS....and I dont like that! I turn my struggles with loving vs hating into just taking care of them the best i can. And always praying for them and hoping the best for them.
They hurt me and its hard. But God knows my weaknesses and I need His Grace just to live with them at times. So go....and see what you can do to help her....and dont worry about the love-feelings, which may still be temporarily "slain" by the years of rad stun gun action.