Answer and Explanation:
1. The speaker is not reliable because he presents the story from his own perspective. This makes the reader only know the point of view of the speaker who can manipulate the story in any way he wants, since only he knows it. This shows that he is not to be trusted, so it is not possible to believe everything he says.
2. A part of the poem that can promote doubts about his words is when he does not give a name to the place where Annabel Lee lived and talks about her feelings as if he can read her mind.