I get a feeling if you talk to him, he is likely to say rather than him help you, you need to relax more and let people make their own choices.
I dont think he is depressed, I think he is just doing what a lot of men do, and seeing you cope, therefore letting you get on with it, as it probably seems to him that you enjoy being in control, and are maybe a bit of a martyr too. Dont take that the wrong way, it IS an easy role to fall into.
Perhaps he feels you spend all your life running around after your children and organising their lives, and have little time left to be a couple.
I will always say this to people. One day, those kids will have left home, and it will be just the two of you again, so dont let things get so far apart that when that time comes, you dont have anything left in common and have lived separate lives for too long already.
Your children are not babies now, they should have more independence, and if it means things dont get done, or get forgotten, then it is a life lesson learnt.
You sound like a fantastic hands on mum, but you are a wife too, and perhaps your husband feels all he is seen as is a dad and wants a bit of you to himself, which isnt unreasonable.
Go on strike for a bit. The whole world will not fall down around you, I guarantee that.