There are levels of exhaustion, depression and loneliness at the end of life. I just turned 69 but have been living a quite isolated existence for many years now, functional and ambulatory but that's about it.
I would never try to convince anyone that life is worth living, since I can't put myself into place of their very own life. I have come to think of it as surviving gracefully, not so much living. I am glad to know you would not end your life although I remain curious as to the stigma thereof.
I can only wish you peace, or as close to it as you can come at the tail end of your life. The best some of us can do is avoid pain and maintain the status quo. God bless you.