Just gonna say if it already hasnt that this show is definitely a slow burn, it takes its times with it's characters and is in no rush to get anywhere. But I'll tell you that each scene, moment and character decision is going to pay off later.
As for Jimmy, hes in love with Kim! He realized the life back in the pool is starting to feel a little lonely/empty without her (this after calling her twice and it going to voice mail while he was in the pool). This comes after that discussion they had about how they wish they can do that every night. He knows that Kim cant be part of his con artist lifestyle