I'm sure you're not the only one looking forward to having some space. My sitch was different, but once BF was out of the house I was much happier. I was able to be comfortable and relaxed in my own space and he was able to see that I was not the cause of all his unhappiness.
And no, it's not giving up on the M at all to want some time apart.
I agree, I think once you showed her you would not fight a divorce it perhaps became less important to pursue. The less you offer things to fight the more she will have to take responsibility for her feelings/actions.
Sounds like you're doing great so far, keep up the good work!
If you love somebody, set them free. http://tinyurl.com/2empx2g