I don't know what to say to my dad about his cancer. we don't know yet if it has spread or if they've caught it early but still.....I'm scared to ask him about it. I'm scared to bring it up. I keep thinking things will turn out good because the alternative scares me too much.
If you want my advice, you should try to speak to him about it. First ask him if he minds talking about it, or if he'd rather not. Respect his wishes, but tell him that he shouldn't not talk to you because he's trying to protect you. Then take it from there. It's a very difficult thing to come to terms with. For him, for you, and for the rest of your family.
My mother died of cancer when I was 14. My parents protected me and my brother from it as much as they could. But there are times now where I wish I'd asked them about it, or spoken to them about it a bit more at the time. It's not like a defining thing in my life, and it's not something that cuts me up to think about now. But if I had that time again, there are things I'd do differently. Talking more openly with my mother about what was going on, how she felt, what she wanted, how I could best support her, etc, is one of the things I'd do differently.
I'd like to think that now I'm older, should the worst happen to anyone in my close family, that I could speak with them about it honestly.
Good luck. If you ever need to talk, you can always PM me. Likewise anyone else, whether you're struggling with it yourself, want to know about how kids deal with knowing their parents have cancer, or whether someone close to you is struggling. Always here if you need anything.