I'm sorry BH, but in her mind she's not having an affair cause your marriage is over. It just needs to be finalized.
Your old marriage is gone. Do not for a second think that this version of your marriage is fixable. If you want to be married then its going to be a completely new version. Its also going to take a year or two.
A lot of your responses come from the "Us", "We", or "Our" prospective. Or, even worse, "She is doing this.....", "She is doing that...."
I want you to look up cooking classes in your area. Or if there is a local community college, look up classes. A dance class maybe. Something that will get you out of the house, something that you can meet some new people, something that you can have some fun doing, be a bit mysterious, a change of pace. These will all help you detach, grow, expand yourself. Don't sit back and let life pass you by.