Shoulda, woulda, coulda ... all sorts of things are done that shouldn't. We have to deal with the fallout, even when everybody involved did what they should have done. There are always unintended consequences.
I'm joining this conversation to say: Changing one's course in the light of new information or subsequent events is one of the main tools we human beings have in our toolbags.
You made a promise in good faith based, presumably, on how you thought you'd respond to any revelation. You underestimated the pain of finding out your W was unfaithful. You have every reason to withdraw your promise to R.
IMO, recovering from being betrayed works best if the BS recognizes they have a free choice between D, R, and gathering more info. IMO, you can say 'yes' to an option only if 'no' is a possible answer, too.
Also, gently, I understand that your whole life may seem like a lose-lose proposition right now. It's not. You can survive and thrive. My reco is not to choose between D & R until you see yourself living a joyful life either way. Believe me, that day will come if you let yourself heal (and get help when you can use it). So far, your posts say you're letting yourself heal.
Committing to R
When I was in the early days after d-day, I saw every issue as 'stay-go'. I mean every issue that popped into my mind - if I didn't like what my W chose to wear, I asked myself if it was the deal killer.
My W acted consistently for R for 90 days, and I committed to R. But D was still an option that I could not ignore, because it's always there. A married person can almost always D. In a real sense, staying M means choosing to stay M every moment - D is always an option, no matter what promises were made.
Give yourself a break on this - breaking your word may be best for everyone involved here.
Requirements for R
I was a consultant on d-day. I was taught to think in terms of 'this is where I am - where do I want to go? - what do I have to do to get there? - (and especially) how will I know if I've arrived?' That led me to figuring out my requirements for R.
My W and I negotiated on the details, but we agreed on what I thought were the big ones - no more lies, answers every question, No Contact, IC for her, MC (because we had a great therapist).
What do you want from your W? Answering questions is a great start. What else do you want? Will she sign up to give you what you want? If not, are her objections enough to go straight to D, or can you negotiate substitutes that truly satisfy both of you?
Have faith in yourself to heal and to make good choices. You are probably undecided now, but have faith in yourself to decide in a timely enough manner. And have faith that you can live a good life, despite experiencing this horror.
Some reading recommendations (with links that I think are still live)
https://www.survivinginfidelity.com/healing_library/reconciliation/what-every-wayward-spouse-needs-to-know.asp - if this resonates with you, I suggest printing it off and giving the printout to your H as 'something you found on the web.' My reco: DO NOT tell your H about SI until you're sure he's on board for R.
threads for newbies: http://www.survivinginfidelity.com/forums.asp?tid=361740&HL=14993
Tactical Primer: https://www.survivinginfidelity.com/forums.asp?tid=235051
Boundaries and Consequences 101: https://www.survivinginfidelity.com/forums.asp?tid=385631
Setting Healthy Boundaries: https://www.survivinginfidelity.com/forums.asp?tid=231851
Before You Say Reconcile: https://www.survivinginfidelity.com/forums.asp?tid=406548
The Simplified 180: https://www.survivinginfidelity.com/forums.asp?tid=598080
20/20 Hindsight: What I Wish I'd Done: http://www.survivinginfidelity.com/forums.asp?tid=161389
[This message edited by SI Staff at 6:01 PM, Monday, December 13th]