Dear April,
If you feel like crying, go ahead and do that, but if you don't feel very emotional right now, that's OK, too. Being sad when someone you care about has a serious illness is normal, but that doesn't mean you have to be sad all the time. Try not to feel guilty when you're hanging out with your friends or doing other fun activities. But spend time with your grandfather, too. Ask him what he'd like to talk about or do. You might play a board game or watch a funny television show together. If your grandfather is going to get treatment for the cancer, you might want to find out more about it from your parents so you can be prepared.