Maybe the separation will help you both. She'll realize the grass isn't greener after all. And, you can use the time to work on yourself and let go of the anger. Think of it this way maybe, would you want to come back to the current you? You need to make yourself the person she's crazy to leave. Make those changes in yourself first, so theres something she wants to come back too.
Theres obviously something there, or there wouldn't be a roll coaster ride in the first place. Address what you can, and let time take care of the rest. I think if you give yourself to the transformation, you'll come out of it in a the better.
