Future-fic. Castle and Beckett decide to enjoy a sunny day outside. ' "What do you think of going out today? I mean it's warm and sunny, we could go to park or some place else. Since you have the day off...," he started rambling and Kate couldn't help but laugh at his adorable face.' Just fluff.

Post 7x14, basically Rick's thoughts right after the end of the episode.

Early S4. "A few more splashes and then it hits him, he's absolutely, utterly, ridiculously, head over heels in love with Kate Beckett. And he has to act on it before he goes insane."

"It hurts this much because he loves her so. The risk of love is loss. And grief is the price."