JAMES.
It's not a lot. It'll never be a lot, James. I'm here - whatever you need. I can't guarantee I'll say the same thing in response that other me might have, but I'll always be willing to listen and help where I can.
You're right though, Bucky doesn't know that, and maybe what you said might be too much. But there's a middle ground in there somewhere. I can even tell him something if you'd rather not have to do it yourself. It doesn't have to be all that but even just a you knew a version of him and you were close could be enough. Bucky will understand that you need time.