"You will never know how much I appreciate the kindness you've shown me. And I will spend the rest of my life trying to pay it back in whatever small doses you allow." The reason why this scene resonated with me is the way it circled back to their very beginning. To their foundation. This is a call back to all the different times Lucy showed Tim kindness, and this, from the very first day… And how it was those moments of kindness that chipped away at Tim's armor, creating this bond between them in the process… Something that has not been acknowledged - not this way. This almost feels like a new beginning… But with their roles reversed : Lucy is now the one who is guarded, hiding in a corner, with her walls up and still a bit angry (rightfully so) while Tim is the one trying to reach out and promising to show her that same kindness.
And what makes this actually romantic to me is that… it's not trying to be. This scene isn't about their relationship. This is about their friendship first. Because before they got together, they were friends (despite Tim's protests). This was their foundation. A foundation that was shattered in the aftermath of their breakup. So I find it more meaningful that he is trying to show up for her on that level first. To show her how much he appreciates all the things she has done for him over the years - in whatever ways she allows (an important distinction). He isn't trying to get her back. He's trying to show her how grateful he is for her and what she has done for him, something that she definitely needed to hear. This is about what she deserves. And I think there's something inherently romantic in this.