You say 'snap back' because you believe this isn't really her. That another 'her' is underneath.
Sorry to break it to you.. but that girl you knew has gone. This person wont be the same again.
When you completely accept that and go through the pain of acceptance can you start to move on yourself.
After that who knows.. because becoming that person is the only way you come close to even having a chance of genuinely recon with a WAS
My wife, as I knew her is gone. But the person she is now, I love.
Married 9: Together 11 M:37 W:35 S:2 D:7 Bomb dropped 6/3/2017 W moved out 7/1/2017 Separation Filed: 8/1/2017 Modified to Divorce: 8/21/2017 Divorced: 10/5/2017