Your behavior sounds okay. It's normal to feel intense grief or numbness when first learning about a friend or relatives serious injury or illness. This can last for a while, but eventually the body/brain start to reset back to a more normal mode. There will still be some grieving feelings and thoughts, but they won't be as intense. My mother was in the hospital for 5 weeks before she died. About a week before she died, we had a conference with the docs about her situation, and what to finally do. She was gradually dying, and they could no longer keep her there, on her Medicare and Supplemental, due to regulations or something. We had to decide on whether to unplug, or have her go into some sort of hospice or medical based nursing home, that could have been anywhere in the state, not necessarily the closest one, or to bring her home to die. We opted to bring her home. Once the decision was made I really lost it for a while. It took a couple of days to make the arrangements, but then my mother ended up dying in the hospital a short time before the transport crew arrived to bring her home.
There is no need to feel guilt. You are still sad over what happened to your friend, and about the fact that he will probably not make it. Grieve your own way. That is the right way for you. And remember, it can be different each time, because each relationship we have is different.
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If a man does not keep pace with his companions, perhaps it is because he hears a different drummer.
Let him step to the music which he hears, however measured, or far away.--Henry David Thoreau