This kind of obsessive licking, especially to the face, is a submissive behaviour. Can you give some details of the other behaviour your dog is showing? It sounds like a very submissive dog that is doing what it thinks you want - showing submissiveness. You are it's God and it's paying homage!
I think this dog needs some confidence but if you let us know some of your other behaviour concerns the picture may be a little clearer (she sounds lovely, by the way!) - thanks.