Don't say anything, just be pleasant (in front of him), get into therapy for your sanity and focus on healing and being strong. I remember going through some really extreme and painful emotions. I think a positive type of "hybernation" for the time being-- where you are totally focusing in on yourself and doing things for YOU is good. I remember sleeping and shopping a lot at the time. Find some local friends others who are single or divorcing to GAL with.
Expect your husband to be really mean and evil. Mine did!!! But be pleasant in spite of it. In the long run, regardless of what happens, it will be best for everyone involved. Also, look at it this way.. it doesn't hurt to DB and you lose nothing trying (as long as you are protecting yourself legally which you'd have to do anyway).
Read books on MLC, DBing, relationships, positive messages, etc...
And don't feel too bad it you have to shut down for awhile, sleep and cry. That's pretty normal. Eventually you'll feel better. Hang in there.
There is no arriving, ever. It is all a continual becoming.