The "shark eyes" thing is very common. It's as if they've turned off their soul. I recall my ex-wife's eyes changing from soft blue-green to blazing green (or it might have been blue).
It is possible to continue to love the person that they were. That's not the person who they are now. This person is a stranger who very likely views you as the enemy. There is no way that any action of yours can change their mind. You can reinforce that opinion fairly easily though.
Will they be "reborn" as a new healthy person? The odds are TBH fairly low. Courage and the ability to examine the person they see in the mirror aren't skills that many people who are selfish enough to have an affair possess.
Stay true to yourself. Mourn the loss of the person you loved.
On BD H52, W50 T27, M26 S21, D23 BD-9-Mar-16 D-15-Jan-18 Final-19-Apr-18 I am a storyteller. The story may do you no good. But a story is never for the listener. It is always for the one who tells
