Actually no I WILL talk about how much I adore the last conversation Bojack and Diane had.
He tried to make a depressing joke, ("Wouldn't it be funny if this night was the last time we ever talked to each other?"), assuming she'd play along or agree, but she didn't. Bojack gets visibly confused and maybe even uncomfortable by this. Silence. Bojack tries to save the conversation, only for Diane to cut him off. Bojack tries to avoid what he knows is coming - abandonment - but then Diane catches him off guard with a "thank you", and just for a split second he takes as reassurance that she's not leaving. Then Diane continues, tells him it's going to be okay and that she's sorry. Bojack gets that pit in his stomach again.
Diane says thank you once more, almost as damage control, as she tries to leave. Bojack desperately tries to keep her around to prolong the inevitable, just for a bit more. Just one last good memory. For the window of time that he tells the story, you can see Bojack loosen up. He gets hopeful again. He smiles. He almost forgets Diane is gonna leave after he runs out of words.
And then he does. His words stop, their voices die out with their laughter and the familiarity of the conversation. The familiarity of them. They have nothing left to do. No other way to end their chapter together.
Bojack decides to end it with another depressing joke, as has been customary for his and Diane's dynamic. But instead of laughing or agreeing, Diane goes against his words. Discomfort and confusion outline Bojack's features again. That's not right. That's not the Diane he knows. Then Diane talks about how nice of a night it is, and Bojack goes back to smiling and a more comfortable demeanor. "This is nice" he says, and looks to Diane for approval. He frowns when all she does is stare at the sky. The realization finally sets in, finally. Bojack looks at her with concern, praying she'll just say a simple "Yeah". But nothing. Defeat. And then acceptance. They stay in silence. You can see Bojack wants to say something, to try and save this relationship. But a part of him pulls him back. The part of him that knows the truth.
Diane changed for the better, when he just changed.
