I believe you are investing too much time and dignity in attempting to prove yourself to this girl friend. I believe your are taking the 'simple' and making it 'complex'. You need to give the rest of the world an opportunity to be involved in your life; there are lots of people to know and over half of them are female. Personally, and this is just my opinion, I don't think it is proper to have a goal of getting someone back. It is like driving your car backwards in a freeway using your rear view mirrors.
You said: "So my plan remains, "Be the best I can be right now, without her. Live for myself. When the time is right charm her into falling in love with me again."
You need to delete, "... charm her into falling in love with me... " That ain't the way it works, IMOP.