"The Apparition"

"When by thy scorn, O murderess..."  The poem "The Apparition" by John Donne is a confusing poem in my opinion.  The quote beginning this blog made me think that the poem must be about the killing of someone, or it is about something scary.  I feel that the speaker may have been kidnapped, and they are worried about being killed.  They are thinking of what will happen to them when they die.  Also, the speaker was talking about his loved one, and he mentioned "his ghost."  This made me think that the speaker was worried about his loved one, especially for her safety.  Another meaning of the poem could be that the speaker is afraid of dying, or they afraid of their loved on dying.