Answer:
Annabel Lee is his soulmate.
Step-by-step explanation:
In the poem "Annabel Lee," the poet describes Annabel as a young woman who died. The speaker is absolutely devastated over this death, and the poem represents a way to remember and honour her. Throughout the poem, the author is explicit about the fact that he was in love with Annabel Lee, and because of this, we can assume that he considers her to have been his soulmate.