Always a shame to hear of family and friends with a diagnosis of cancer. No, it's not mad to feel as you do, if you love someone it is hard to watch their journey. When my daughter was diagnosed at 30 with thyroid cancer, now fully recovered, I kept the brave face whilst constantly worrying, that is what makes it so hard. Equally, they are probably doing the same to not upset us. Human emotions are complex, an understatement, but I am sure she is extremely grateful for your support. X