A TV breakup can be just as emotionally devastating for viewers as a TV death. You invest a lot of time and emotional energy into fictional relationships. You're there for the first looks and first dates, whether the romance escalates quickly or slowly plods along. Your romantic life may not be thriving, but those two belong together. And sometimes their fights are so dumb! He's trying to protect his significant other from his dangerous destiny. Or she can't bring herself to date a co-worker. Or his immortality means it'll never really last.
Whatever the reason, and even if the breakups were only temporary, these were rough moments to be a romantic and a TV fan.