Theland, I knew this was coming for you some months ago, knew you were entering the end stage of your illness, I have been with a fair few lung patients at this time and so many struggled.Depression and sadness are normal, but so too can be relief, on the bad days knowing they will soon be done. Everyone seems to sympathise if you have cancer but COPD isn't understood that well this can make it harder to talk about just how bad it can make you feel.
It sounds like you have done everything you can and now it is time to concentrate on sharing quality time with those you will leave behind.
It's not the grand gestures, it's the quiet evening revisiting happy memories that stay with families, it reinforces to them that the time you spent together was important, that they were valued, and it will help them when you are no longer around. I wish you the time you need, but not a minute beyond the time you are ready to leave.