I'm so sorry, this kind of pain doesn't compare to anything else. I almost lost my father back in 2021, when he got sent to ICU for covid. Everyday, for weeks, we waited for the doctors to tell us if he was still alive. It feels like a hole in your chest, life stops making sense.
Share the love you have for your brother with others, and be there for your parents. I hope you're safe and taking care of yourself. This might not mean much, but I prayed for your brother yesterday, and I'm sure many others did as well.
Love is painful, but it's real, and it always will be. So love with all your heart, and know that it was not in vain, seeing that even strangers who you never met can share your hurt.