Why is she in my thoughts even more since the papers came? Why can't I just move on now? Why do I want this when she doesn't?

together 7+yrs
Married 3
Me 33
W 33
no kids
BD 9/12
MC 9/12
W leaves MC 10/12
W moves out 11/12
Divorce 2/13
W moves 5/13
NC 05/13
D final 8/13