but the more and more I detach, the more I think it isn't working. I feel as if she's drifting farther away.
Here's how Ive read is a way you can think about it. If you go for a walk and she is three steps ahead of you the whole way, what happens if you just stop walking? It may be some time before she even realizes you arent walking anymore. But from your perspective, you can watch her continue to get farther and farther away, right?
Be patient and trust the process. Giving her the space she is asking for is the only way to go. If you run to catch up now, she will never turn around to check if youre still back there.