IMO, he his reffering to himself as friend. He has changed drastically and feels that he is no longer the same person. It seems he has lost himself and is trying to get himself back on track.
"I made wrong moves, a dog rose in bloom later withered
Then the shock, that shakes me still, came almost fatal"
But like exscape said it could be about anything, interpret it however you want.
IMO, he his reffering to himself as friend. He has changed drastically and feels that he is no longer the same person. It seems he has lost himself and is trying to get himself back on track.
"I made wrong moves, a dog rose in bloom later withered Then the shock, that shakes me still, came almost fatal"
But like exscape said it could be about anything, interpret it however you want.