Pat,
When I was younger, I thought of suicide A LOT. The main thing that kept me from doing it was my kids and the fact that they needed me. And that the people that would end up raising them if I was gone, were totally incapable of doing a competent job.
The main idea that I used to help me cope with sticking it out was:
Pretend to yourself that you already did it. It's over. All the pressure, all the depression, all the problems are over.
Then all that's left is a chance to start again. Why not see what you can do with a second chance?!
You have Ginny, your children, your grandchildren, and us to try to live for. There are reasons to try for a second chance! And there are things you can do to try to make it work. Whether therapy, calling for help from the medical community or from family (maybe even moving in with family?), or just little things like practicing gratitude for the little things (like running water, refrigeration, the internet, the simple beauty all around you, and of course family.
Why not try to start over? Pretend it's a fresh start!