IMO, if she is the one that doesn't want to work on the marriage and needs space, she needs to move out. I would stay put. My H could not commit to working on our marriage, and I told him that perhaps it would be a good idea for him to move out for a couple of months and it might give him clarity. He agreed. That was Oct 1. He's no closer to clarity than he was back then, but I'm happy to be in my own surroundings. Stand firm.