A lot of people don't relize how hard it is to watch someone who you love so much slowly die. To see them go out and act so normal, that you wouldn't think even for a moment that they're sick. They look so normal. But when they get home, they need to sit down, put on their oxygen mask and sleep. It's so hard to stay in that room, to hear the oxygen machine tick.
And to be in school, and listen to people joke about cancer, dying, ect. It's funny until someone who you hold dear is the one who's trying to kick cancer's butt. Then it's not funny. At all. You just want to hide, curl into a ball and cry.
Never undervalue the gift of life. It's so precious. And after all, in life there is only one certainty; death. Use every moment as if you won't get another. Cherish it.