"I told her to close it. I chose everyone else over you just like I did with him." It's impossible to miss the self-loathing in his voice. He made the right decision, but look at what it cost. Tony is traumatized. Bucky can't even remember his own name. He hates that he sacrificed good men like this. Captain America should be better than this.
He looks at him with watery eyes when he pulls his hands away from his face. He hates himself more than the idea that they all know despite how it tortured him in New York. That's the only thing stopping him from snapping again. "I know that's what all of you think, but it's not true. It's never been true. The people who knew me are gone now. I am alone and I should be. I did this to myself."