The willow tree scene is kind of heartbreaking because I don't think it went quite how Colin hoped. I think he thought she also felt this crazy shift between them after their kiss and would maybe want to START courting. When she says we cannot continue our lessons, and he says kind of excitedly "I agree!" I think he thinks she means, because she wants him to court her instead. Further implied when he asks for clarification on why, asking if it is "because of what happened between them" alluding to her possible feelings towards him. But of course Penelope's dream of Colin reciprocating her feelings is virtually dead she doesn't even entertain the idea that the kiss could've been as intense for him as it was for her. And he looks so taken aback when she says they should keep their distance, which is literally the opposite of what he wanted. and he still wishes her happiness, even while he's dying inside.
"For God's sake, Penelope Featherington, are you going to marry me or not?"
Colin, love, she had no idea you had any feelings for her until 10 minutes ago and you literally spent that time trying to eat her titties while your fingers were exploring the unseen, give her a second
colin's exasperated sigh before he said "could the carriage driver not keep on driving?" is so laughable and one of my favorite little moments like my boy was BUSY he was not DONE