[ He starts shaking his head before Sam even finishes. ]

It's not like that either - you're a stand up guy, Sam. I'm damn lucky you turned up when you did. [ Which still isn't the right thing to say - he closes his eyes, opening them again a second later. ] I'd be even luckier to call you a friend. [ He offers back a half smile that fades as he continues. ] I'd choose you any day. I guess... I wanna make sure I'm not asking too much.

[ Asking Sam to carry too much weight in all of this, especially with Bucky. ]