At least she is willing to work on issues. That is hope. Be careful, I have been living off of hope for too long. It is a hard habit to break. Give her the benefit of the doubt. If divorce is not an option, I guess it is the only option.
Separation does not have to be the wake up call. I have actually known of people who separated and never divorced, for whatever strange reason. But if you can be happy that way, I guess it is an option.