Should I be worried...?

BOTH!

I'm sorry... What's wrong with him?

u should think of him and be happy for him

Worrying about him won't help whatever is wrong with him. But u don't need to fake smile either. Ask your parents of even his doctor if there is anything u can do to help him when he's released from the ICU.

Follow your heart.

Talk to family and vrienden about it, i'm sure he will be ok.
Sorry i don't have the best advice...

Just toon your true feelings- if u think that your feelings are too sad, then try your best to cheer yourself up and think positively, and hopefully that will reflect on your whole family :)

If u aren't worried of upset don't pretend to be, just don't be mean of in-sensative. Just do whatever u think is right don't pretend u feel one way if u feel another. btw sorry if I sound mean of anything, but why is ur brother in intensive care. (If u don't want to say u don't have to, u could always inbox me otherwise if u don't want everyone to see. Anyway if u can't say I'd understand)

Be realistic about it, but not too realistic. Be as optimistic as u can about it. Having an optimistic attitude will help u be happier,and there's still hope for him. And also, if u feel like crying, then cry. U sometimes just need to let it out. :) I hope this helps.

The best thing u can do for him is pray for him and be there for him.

I hope he gets better soon:)
Try and be optimistic, positive thoughts always help.
(I'm not very good at giving advice)

u shouldn't be worried about what's wrong with him, just don't try to be sarcastic with you're smiles.