He heard the words; "People are gonna die, Buck. I can't let that happen. Please don't make me do this."
This may never start, I'll tear us apart. Can I be your enemy?
It wasn't even about loyalty to Hydra anymore. It was about ending the pain. It was about the lie that he hid behind because the Soldier didn't know how to be human, to live in a world that he thought he remembered, a world that had come back to life with Steve Rogers.
Nothing made sense when Steve spoke. So Steve couldn't speak anymore. That was the way it had to be.
"Then finish it. 'Cause I'm with ya to the end of the line."
This may never start, Tearing out my heart. And I'd be your memory.
"Tell me who I am." "You're my friend."
A second chance. A way out. A long road that he did not have to take alone.