The OP seems adamant that it's all real, but does it seem like a being in character thing? (I sent him a PM saying ''nice creepypasta, are you going to write more?'') and he replied that it isn't a creepypasta and it's true. That it's haunted him for years and he is scared of the monster coming to kill him too. He also adds to the story in comments, often involving large paragraphs and the details in those comments make things creepier.