Agree w/DanF- you let her go. Do not try to show her any more changes right now or persuade her to not move out. If she says "it's too late" you can say "I realize that now and I'm sorry for the pain I caused you. You should go, that is the best thing." Then drop it and work on you for you- not to get her back, but so you can figure out how to stop being controlling to the point that it has affected major relationships so this doesn't happen again- with her, should she decide down the road to change her mind- or with anyone else.
(((hugs)))
When the men on the chessboard Get up and tell you where to go; And you've just had some kind of mushroom And your mind is moving slow; Go ask Alice... I think she'll know.