That, that emotion, it's a feeling that Bucky can understand. He feels the same way about Steve. There's no way he can picture his life without Steve in it and he hates that HYDRA tried to do that to him at all. He smiles at Peter, remembering how he used to see Steve when they were younger so many years ago.

"You should do something nice for the anniversary," he says softly. "It's good to have that person beside you, one you trust." He nodded his head in understanding. "No, you can't treat someone right all the time, but you try your hardest and they'll see it. That's what matters."