Why is The Raven called a narrative poem?

The Raven is a poem by Edgar Allan Poe. It first starts off by an unknown narrator reading his old books and he is thinking of his lost love Lenore. He then hears something at his door and he is enthused and he finds nobody there. As he goes back in a Raven flies into his chamber and all it repeats is 'nevermore.' It is then interesting to notice that the narrator knows what the answer shall be and yet he keeps asking questions. Eventually it ends with the narrator asking if Lenore is in Heaven and if she is alright and the raven says, 'nevermore.' The raven symbolizes death, wisdom or knowledge also because it lands on the 'Pallas' of his chamber door. His chamber represents his heart, and by the Raven being above it, it speaks truth and is blocking his escape from getting over his misery over the loss of Lenore.

The Raven by Edgar Allan Poe is a very emotional story. The raven represents the never-ending pain the narrator goes through. The memory and sadness of the "long, lost, Lenore" "nevermore" leave the narrator's conscious. The last line goes, "...and the raven, never flitting..." the sad memory never going "...and the raven, never flitting, still is sitting, STILL is sitting on the bust of Pallas just above my chamber door. And his eyes have all the seeming of a demon's that is dreaming. The lamplight throws his shadow on the floor. And my soul from which that shadow is on the floor shall be lifted...nevermore!"

P.S. Not all translations were 100% correct; a few punctuation errors.