I feel for you, i have just lost my wife. And those who do stay are angels.
Try to explain to her more, and see if she can support you if not as a wife, but as a friend. That way she will still be in your life. She may feel left out of this chapter of your life and that is what's hurting her. Ask if she wants to start going to counselling with you. But do not push her away. Give her space and time. If she stills want a divorce, then do not get angry or do anything stupid, you will only make things worst.
She may say things to hurt your feelings, but do not get upset and argue, you are better than that.
My wife, stopped talking to me when i came out, and then got angry, and then just went off and started dating. It upset me, but i did not show it. I stand by my decision, because i know going back would be the death of me. And if you really feel the same, and need to open up and be your true self, then you should, and no matter how hard life will get on your journey, at the end it will be worth it, and life will be so much better.
Hugs to you, and hope you will be ok.
Andrea