I know we joke about the "im hungry" thing a lot but Kim is honestly so real for that I also wouldn't be ready to say "I love you" to someone I'd been dating for a few weeks at best, and Kim's response of just changing the subject was probably the kindest option. like yeah it sucks for Chay but. even if kim hadn't been using Chay for his investigation and they were just innocently and genuinely dating, it probably would have been too soon, especially for someone like Kim, to say I love you. I think he's so valid for that!
you've got a traumatized, paranoid mafia prince with like. disorganized/fearful avoidant attachment and you're expecting him to say "I love you" after a few weeks of a very precarious relationship? lol