I'm so sorry about your situation, it really stinks.
I went through this years ago, and it worked out. Unforunately, I'm here again, for different reasons. But have faith.
You're doing the right things. You're being proactive, you're getting the coaching, you're not purusing. You're listening to what he's saying - I recall that being an important thing, listen, don't invalidate what they feel or say.
I don't think you screwed up with the book. I don't think it's a big deal at all.
If he talks about D, I'd ask, what's the urgency? We're dealing with a lot of things, can we just slow down and be sure. I think it's a rational argument that nothing is driving it to be done right away.
But regardless, filing or not - you're working on you. You're not going to save the relationship by standing in the way. It's not about resistance. It's about you. Get a life. Postitive mental attitude. This will allow you to put good energy into the relationship.
Remember you're going to come out the other side of this. Work on a great life for you. The idea is, then he'll want to be a part of it.
I'm still dusting off the cobwebs for myself, others may have good insight -
