Dame that is a brilliant post. You are spot on about boundaries.
Ok suggestions for this evening - just to think about and then do your own thing
, based on him being a problem solver and quite scientific.
Talk to him about depression, explain that antidepressants will not control him to the extent of making him better. They might raise his 'get up and go' enough to help him to make changes for himself.
I would also suggest (and this was the argument that swayed me) that by not seeking help and/or ADs he is not being fair to his kids. They want a Dad to love and care for them - they deserve a dad to love and care for them. I am sorry I do know you deserve more too but I can admit that it was the thought of my children suffering that made me change not my very much loved husband.
You then need to talk about coping mechanisms, he needs to plan some for himself bearing in mind that ADs or other treatment will take a while to work and he may feel worse before he feels better. This is not a quick fix.
Get him to google 'men, depression and coping'. I would perhaps show him the link I posted earlier and maybe even sit with him and help find good information. However he needs to learn from somewhere/someone other than you that alcohol will make him worse in the important short to medium term. He might also like to look at the literature about exercise helping to lift depression.
All this is only the start. If he starts admitting he has a problem (and it sounds like he is beginning to) and starts trying to get to sorted then by all means support him every step of the way. But, be quite clear that you will support him, not do things for him. You can't sort this for him anyway as much as you would love to. This will take a long time and only he can do it.
I can't emphasize enough that ADs are just a lift to get started; they are not the answer. I would add that CBT works well for many men but I think it is way too early for him to consider that right now. On the other hand if offered by GP grab it! It will take ages to organize anyway!
OK, now then. You. You need help and support. You need to know that you and your family are safe from any type of abuse. As someone said earlier depression is not an excuse for being a shit - although it can explain why I am shitty sometimes! .
Tell him in no uncertain terms that you love him and will help him but that you will not allow your family, your children, to suffer along the way. Ask him what he suggests. If he plays the go off with a bottle of whiskey card just tell him how disappointed you are. Don't argue with him, don't offer undying love right there and then, just ask him to think about what is best for him and the family as a whole. Maybe, but only you can judge this, explain that you personally would like to try and support him if he is helping himself. Suggest you both need to think about it. Take the suggestion of him leaving very matter of factly and ask him if he thinks it would be fairer to to the whole family to try and seek help while you are all together first?
Finally, as I said before, the best advice here has been about getting support for yourself, making your life better etc. At the end of the day you clearly love him and want to help but the only things you can change are those you do.
I think you may be close to giving an ultimatum as suggested earlier but as he has only recently (last night?) admitted to depression give him a little leeway yet if you can, safely can, that is.
Sorry this is such an essay, and some of it is badly written and I have to go so it is post as it is or leave it time. I feel strongly about this. Your love for him comes through loud and strong. He is not being fair but then it is not fair that one partner has to carry the load if the other breaks their leg either. Mind you if that person carries on trying to use said leg and does not rest and attend physio as prescribed than I reckon we would all get cranky.
Of course abuse is a different matter but I am not sure from your posts you are quite there yet. You sound very very tired. worried and stressed. I am glad you are going to the GP, I suspect you might benefit from a little help while this works itself out as well.