Irony of Porphyria's Lover

The poem "Porphyria's Lover is completely ironic. The speaker tells a story about love, so you think. It is really about murder. He speaks of how he love Porphyria so much. He isn't sure she loves him tho and is surprised when he realizes she does, "Happy and proud; at last I knew / Porphyria worshipped me; surprise" (32, 33). He wants to keep that moment forever. So as they lay there he strangles her with her own hair. It's okay tho, he believes, because she didn't feel anything "And strangled her. No pain she felt;" (41) and it's what she wanted "Her darling one wish would be heard" (57). It's ironic to love someone and to strangle them to death. To watch someone you love slowly dying is awful.