Bright, I'm sorry to read about what transpired yesterday. Okay, now here's a 2X4 from me...stop thinking that you were a terrible wife. Stop blaming yourself. Don't even think of taking that blame on to yourself because your h is a broken man.
Do what you need to do to protect yourself financially. Grieve the old marriage and then pick yourself up and continue moving forward. No one knows what the future holds and this "divorce" may be what he needs to continue his quest to find the answers within himself.
Again, I am so sorry.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.