From your tag line, our spouses could be the same person....they even moved out on the same day!
I'm struggling too...it's tough. I think it will get better with time, but right now I'm hurt, angry, and frustrated. I can say for certain my W hasn't thought thru everything, and she certainly thinks she can cake eat like she's been doing while living here. Sounds like you're in the same boat. My plan is to limit contact as much as possible, keep it to texting/email when necessary, draw some boundaries and ensure she deals with her choice to leave without a safety net, and pretend she's dead the rest of the time. Time to move forward. If she comes around eventually, maybe I'll be open to it, maybe I won't. I'm going to try to stop worrying about the marriage and worry about my own sanity.
