Maybe his girlfriend was a little more pale than usual and wore a lot of sunscreen, but they lived in LA where the sun shined 98% of the time. Maybe her eyes turned red sometimes, but he hunted ghosts and demons for a living. Maybe she looked the same as she did when she was twelve, but he's no stranger to the art of not aging. And maybe she was cold half the time, but he liked being able to keep her warm. Even with all the signs, he blatantly didn't see who she really was because he didn't believe in vampires.