Bucky, you've been given some terrific advice and I agree with all of it. Death is part of life and, even if you take cancer out of the equation, some of us will die sooner than others. Some of us will die later than others.
As the new treatments come out it will be entirely possible to die with cancer and not from cancer and that's what makes it a chronic disease. Now, those treatments are still 'in the pipe' but they will be coming out in the future.
Please try to enjoy what you have today. Yesterday is gone, tomorrow is a promise. Today is the only day that counts.
God Bless
wendyr