Well, I am in the situation you are so afraid of. Chemo, radiation and other treatments suck big time, let alone the effects of the cancer itself.

BUT ... this is not a binary situation, where suddenly life becomes unbearable. There's so much worth living for. And not just the obvious big things in life (kids, family, friends), but also many many small things. Man, that first cup of cappuchino once the effects of chemo wear off alone is almost worth all the puking beforehand :) Or having a nice piece of cheese. Seeing my small herb garden grow. Etc. etc.

The trick is to live a peaceful, content life. Be grateful for what you have. Enjoy your short time on earth.