Decided to revisit some classics and stumbled across how much 'Fevre Dream' by George R.R. Martin wrestles with this. It’s not a romance in the traditional sense, but the bond between Abner Marsh and Joshua York is this intense, tragic thing built on a shared secret and a desperate desire to forge a new kind of existence. The vampire identity crisis is front and center—what it means to be a monster, to have an eternal hunger, and whether you can choose to be something else. Their relationship is more of a doomed bromance, but the loyalty and love there feels eternal in its own melancholic way.
For a completely different vibe, the 'Captive Prince' trilogy by C.S. Pacat came to mind, even though it’s not strictly about vampires. The power dynamics, hidden identities, and slow-burn devotion between Damen and Laurent hit many of the same thematic notes. The need to reconcile your public role with your private self, and the love that survives betrayal and war, feels adjacent to the eternal struggle of a vampire. It’s all about identity forged under pressure, and a love that becomes an unbreakable anchor. Some of the fan discourse around those characters draws direct lines to vampire archetypes, honestly.
More recently, 'A Marvelous Light' by Freya Marske introduced me to a magical Edwardian England, and while the protagonists aren’t undead, Robin and Edwin’s connection is deeply tied to their magical identities—one being an outsider to the world, the other hiding his true nature. The way their love helps them accept parts of themselves they feared reminded me of that classic vampire narrative of finding someone who sees your monstrousness and doesn’t flinch. It’s a quieter exploration, but the ‘eternal’ part comes from the magic binding their fates.