Unfortunately it is often a choice between length of life and quality of life. There are a number of people here who have declined treatment in favour of qualify of life and that's a decision I respect. It's no help to say that but at the end of the day whether or not to accept treatment is a decision for you and your family to take. Have you spoken to the PCUK nurses about the options available to you? They are always knowledgeable and helpful.
Best wishes,
Chris