I did some research on it, it is often compared to social anxiety disorder, and everything I read said it is highly treatable with cognitive behavioral therapy, so I see no difference in my position, it's just a step removed.

If your W is not capable of having sex with you due to sexual aversion, then is she participating in at least weekly therapy to overcome her sexual aversion and recover the capability to function?

If she is not undergoing therapy, then once again that seems like a selfish decision and she's leaving you with a "too bad" attitude.

Married 18, Together 20, Now Divorced
M: 48, W: 50, D: 18, S: 16, D: 12
Bomb Dropped (EA, D): 7/13/11
Start Reconcile: 8/15/11
Bomb Dropped (EA, D): 5/1/2014 (Divorced)
In a New Relationship: 3/2015