One Step All Is Ruined

This person though living for so long, was often stayed alone, his family abandoned him, his friends are more like his subordinate, and his one and only true friend, stabbed him in the back. Though as he dies, he did not feel anything other than a slight regret of unable to finish the series of books that he was currently reading. Other than that, he did not felt anything when his one and only friend killed him. so he closes his eyes as his soul left his body. He thought that he was dead, but when he opened his eyes, he found that he was alive. Other than his own name and knowing that he did die, he did not remember other details about his previous life.