Think in terms of 3 healings - you - your responsibility, your H - his responsibility, your M - both.
Right now, your H is, as others have said, in shock. In a month or 2 or 3, he'll get out of shock and really begin to feel the pain. If that doesn't happen, he's probably stuffing his feelings, and that should be addressed - it's eminently addressable, if he does the work.
It's possible that he'll go for forgiveness too quickly, because he wants to avoid the grief, rage, and fear your A has brought to him. Lots of us R without forgiving (I know that sounds strange, but it's true), but I don't think anyone can R without processing the pain. Given your faith, forgiveness probably will come - but it probably shouldn't come until your H is sure you've repented, and it takes a lot of time to rebuild trust, especially with a(n) LTA.
If you keep doing things that show you're trustworthy, trust and forgiveness will come - it's just a slow process. The SI rule of thumb is 2-5 years from the last hurt. (You write your H believes you're NC, etc. - I'm assuming you also mean that you are, in fact, maintaining NC, being honest, staying far away from TT, etc., so D-Day is the true date of last hurt.
Bottom line: I think your R seems too good to be true because it's too early for the real pain and issues to make themselves known - so a lot of pain is probably in your future.
But you're doing the right things. Stay focused on that, be optimistic, and don't worry about the eventual outcome right now - doing the right thing is the best way to ensure the right outcome. If you stay open, honest, and loving with each other, when the storm hits, you'll be able to handle it.
I think you're making the right choice in telling your H you'll answer his questions when he asks - that's when the answers will mean something to him. I think you'd help your R if you ask him from time to time what support he's looking for from you. Some of this is '5 love languages' stuff (search on that), but some of it is timing. Let him tell you what he needs, since you're probably not a mind reader.
[This message edited by sisoon at 5:53 PM, March 31st (Monday)]