Grieving the Loss of a Brother who Survived his Brain Injury

My brother didn’t die the night of his car crash that resulted in a severe brain injury. I still have my brother here in body, but only in spirit. He is not the same brother. He’s a new brother that I have to learn to love now.
I wonder sometimes what it would have been like if he had died in his accident. We mourn and grieve for the brother we lost but others don’t understand because he survived. Brain injury is like a death but the person is still there.