Like you I am doing BC for the first time. But I am not dwelling on whether it will or won't return. We will all pass on sooner or later. It might be a heart attack or a car accident. Life is for living as best we can while we can. Negative thoughts are not healthy and make us sad. But I do think about quality of life with or without cancer and so like to exercise and eat reasonably well BUT I am not fanatical and love chocolate. I carry more weight than I'd like but not unreasonably. Everything in moderation. I do wonder if things like alcohol are really bad or just a little bit bad! I did enjoy a vodka or two!! Can I let my hair down (haha) sometimes without too much damage.... I guess 'everything in moderation' is probably the key.
We can learn from lessons of the past to make things better for the furture. We can dream and make some plans for a future enjoying family and friends. I do worry about my daughters and their children. But I focus on trying to accept the things I cannot change; finding the courage to change the things I can; and having the wisdom to know the difference. Living one day at a time. (Serenity Prayer). I believe staying positive and living in the now as much as possible - finding good and positive things when everything seems so bad - makes a huge difference. Smiling lots helps. Laughing is even better! And maybe a drink or two every now and then! :)