Oh Limbo, I hope your H wakes up soon, but for now your old life is gone. It's hard but please prepare to batten down the hatches for a long long ride. 

I have difficulty knowing what to say to validate my H's statements too. For negative statements I usually say "I'm sorry you feel like that" and just "um hmmmm" for outrageous statements. But Wonka just posted links to a lot of threads on my thread that I think you will find helpful, including one named "Validating Statements" which is on page 9