I know you aren't placing all of the blame on your wife. Looking back, you were able to see that each of you contributed to the issues in your marriage. I do not encourage anyone to take 100% blame of the relationship/marriage going south. We are human and are bound to make many mistakes along the way. It is what we learn from those mistakes that will strengthen us and make us so much wiser.
Yes, your thoughts are going to change many times over. It's a difficult decision to make, i.e., to walk away and say "I've had enough".
BTW, my questions yesterday were truly not off the wall. I wanted to see how you would react and your responses told me that you are a man who would love his wife to the end of time and be there no matter what. You are a very compassionate man who has been hurt very deeply.
Focus on today and allow the future to reveal itself when it is ready. It's one day at a time for now. I'm glad you will continue posting. It's always good to have someone to bounce things off of and the Board has many, many good people who are here to listen, validate and yes, even give you 2 x 4's along the way.
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.