Well, in that case, even the conversation between Trevor and Jamie you quote is irrelevant because even earlier than that, Jamie tells Seo Jun she thinks it's time for her to grow up and move on from her childhood crush because she's realizing Rockford and her will only ever be friends. But, you rightly chose to bring it up. This is, after all, a free exchange of ideas.This discussion is actually irrelevant to me. For me, the core of the issue was already clear much earlier in the short conversation between Trevor and Jamie: After the movie, Tevor asks Jamie: Why do you let him treat you like a sister? And she answers tearfully: I know. What you are saying is (once again) confirmation of this basic statement (question).
By the way, forget that the paths, including the Jamie path, will be easy. On all the paths I don't expect stones, but rather huge boulders on the way to the desired destination!
All the dialogues reinforce that Rockford blew his chance and he will have a LOT of work to do to win Jamie over, if he chooses to do so. And that's the boulders you mention... However, I don't fully discount a scenario where Jamie stays in the next epi. I just don't expect it. After all, all dialogues in 3.95 episodes pointed to Solomon Hobbs being Rockford's father, and we know how that turned out.