Hello LR, it's always difficult to try and understand why a spouse/partner seems to fall out of love with you when you are together, but if they are suffering from any type of depression, it's virtually impossible for anyone to express their love to you, as well as when you tell them that you love them, it doesn't register, just as saying that they should see their doctor, denying there is nothing wrong.
People who suffer from this can make comments that aren't necessarily valid, but the illness does this, so for him to answer those three questions, shouldn't be taken for granted at the moment.
I realise you have read various different threads, which is really good,but for your own purposes it would be good to talk with your doctor who can offer you a mental health plan, which entitles you to 10 Medicare paid sessions to talk with a psych.
This may benefit you in many ways, understanding how your husband is thinking and then ideas of how you can approach this, but talk about what ever concerns you, that's important foryou and the kids.
Your kids can ring Kids Helpline 1800 55 1800 by phone, web chat or online who can talk to them about their concerns and then give them ideas of how to make them know what is actually happening.
Please let us know.
Geoff.