Well you did have success before when you were going out and not being available for her. I would vote for going dark. Your usual pattern is to be there for her, feel her pain, etc. Try the 180. And remember to try it for at least two weeks.
And, it's only been five days. I'm seven months living in separate places and believe me H has changed. He was completely gone for a while in the beginning too. Take care of yourself and keep busy at this time.
Weren't we supposed to be reading books together? Hang in there - we're all still here for you.