What if, nah, let's say, nah, just hold the bacon here a second:
I'm going err on the side that perhaps Katie's H is just delusional? I mean, he professes HIS feelings for this woman, and all she professes back is that she has no idea what in the world he's talking about?
Maybe I missed something here?
I guess it's POSSIBLE, but he's exhibiting too many signs (ILYBINILWN, paranoid jealousy that SHE is having an affair, etc.).