[It's not so much that it surprises him to hear that coming from Bucky (in fact, that's the total opposite of unexpected between them really) but all the same, he's a little at a loss for a moment. More because a thought that considered his responsibility to himself alone hadn't even been under consideration in his mind.]
To--
[To me? He sighs, his head bowing forward though not quite leaning against him directly as he probably could but hesitates to.] I don't know if I can afford to think that way.