In the poem, there is a distant family to which Annabel belonged and the sea and all-night vigils at the grave site, to name a few plot moments.
See how many of those things, how much of the poem, does fit the story of Poe's lost love.
"Annabel Lee" can be analyzed in terms of Poe's theory and aesthetics and in terms of the qualities that made his work such a widespread and strong influence of other writers and on whole movements.
If I were writing about "Annabel Lee," I would take a a biographical approach.
Later, her relatives came and took her body away from the persona and buried in a tomb.
The speaker adds that his adoration for Annabel was not just teenage crush and even death was not going to separate them.
Along with this, he was a pioneer in defining a poem as a purely aesthetic object that could be justified on purely aesthetic grounds regardless of thematic meaning or truthfulness, as was advocated by the "art for art's sake" movement.
In conjunction with these ideas, he advocated leaving the realms of truth and logic to works of prose, such as the novel or short story, because poetry, an aesthetic art form, was primarily occupied with producing an effect on the reader.
The narrator stresses that even though they were only children, they were sincerely in love that even the angels noticed and were envious.
The narrator also blames the angels for killing his girlfriend, because apparently a wind came down from the clouds, which made Annabel Lee sick and eventually killed her (Poe 3).