Digit, you sound like you're doing great (well...as great as to be expected). My W has already signed her lease and is moving out later on this month. Being in and sharing the house with someone you love, who now doesn't want to be with you, is so hard. I made the mistake and gave up the bed a long time ago. Honestly, I didn't want to be in the bed without her anyways. She was gone a couple weekends and I tried sleeping in the bed and it just didn't feel right. I don't mind sleeping on the couch anyways.
I almost feel like I'm at the point now though, where if she's going to move out (and she is) just go ahead and go so I don't have to be so inundated with her presence. I feel like trying to get/win her back will be easier once she's gone - as opposed to trying to convince someone to stay who has already signed a lease.
Just continue to be strong.
M:36 W:31 D:12 M: 8/9/10 ILYBNILWY/"want space": 2/14-ish/16 W moved out 5/24/16.