OP you are far from alone.
So sorry to hear of this situation.
I have dealt with similar things. My husband had ADD, rage issues, AND depression. Quite the combo! I have felt like the only rational adult many many many times.
The first step here is to get your husband to understand that he cannot will his way out of this depression. It is not his fault. It is not well understood if depression is a vulnterability to it, or something that can happen due to stress and a kind of wearing down of the mind, but in the end, once it gets to a certain point, it just does not matter. What IS known is that medications to level out the altered brain chemistry and therapy to level out the attitudes developed in this chemistry induced fog are currently the best effective method for turning this around.
I had the great fortune of hearing a Terri Gross interview of the author who wrote "Anatomy of a Depression". He described his oh so gradual descent so eloquently and compellingly, that despite the many personal accounts I have heard about depression, I found myself in awe of the scope of elements he described that contributed to the day he found himself unable to get out of bed.
The good news, OP, is that this is not some unique situation. Your husband can be told with the utmost of confidence that everything he is thinking and feeling about himself, despite how very personal it feels, is in every way completely the norm for every person going through this terrible state.
As to your role here: of course you cannot hold the family together forever. Your one task must now be to get him treatment. It will be a thankless task intitally. But you must do it because you are the only person with the wits about you that are needed.
Do you have insurance?
If so, find out who takes it and make the call.
Be prepared for the awful reality that most psychiatrists do not take insurance. And that you need to monitor the situation overall. When meds are prescribed, you MUST research them and learn everything you can about their side effects. Let the doc know you wish to contribute your observations. Look for the right fit here- someone who will listen.
Its a hard path- but OP, sorry to say, as someone who holds this family together, I hear that you are tired, but you must be strong right now. Get yourself counseiing if you can to support you in this undertaking. Call the NAtional Alliance for the Mentally Ill and get their Pysch referral list for your area. I called them the other day and got some good info and tips.
I am realizing I must surround myself with people who are in my position, and there are many of us. Many of us have a spouse who has succumbed to this illness of depression, and it is so very hard. But there is hope once the proper treatments and interventions are in place. Find support in online groups, hotlines, and the most trusted friends. There probably are not many who fit the bill, but all you need is one.
Go the
http://nami.org/ and poke around. You will find some strength in numbers. I know the feeling of being alone. And of having to hide what is going on from those who might judge and not understand. And none of it feels fair, but its not about fair. He is ill and he cant think his way out of this, because the parts of him that think are seeing everything through a filter that is distorted. As bad as it makes you feel, he feels even worse. And I feel pretty darn bad- having been the recipient of verbal and emotional abuse as sort of bonuses to the depression and the ADD. Whee!
Hang in there OP. Again, you are NOT alone.