What does "another fork" in the road mean to you? What are you thinking here?
Let's talk this out loud here a bit more.
Look, you've been DBing only 2 months. This process does take time. It isn't for the faint of the heart at all. I think when it comes to letters (or email), it MUST come from a place of strength...not desperation.
I've helped others write such letters without shaming, blaming or being punitive. A while back, Starsky and I helped Dev write one to his W. I believe Starsky either spoke or wrote such one to his W. They are now very happily reconciled.
Personally, I would not encourage you to write the letter to W. Just respond to your W's email from a standpoint of exchanging information and let it be known that it is not what you want here.
Come on...go ahead and post your draft here asap. We would be happy to work with you on the drafts.
