[John frowns. Should that sting as much as it does? He's not the John this Sherlock is talking about. Isn't he? It's all very baffling and uncomfortable.]

I really am sorry.

But are you still insisting at every turn that you're not capable of love and affection? I used to believe that too because Sherlock was very adamant about it. Up until recently, anyway. And even when he did start to suspect that he was capable of those feelings, I never would have thought that it was because of me. If you hadn't said otherwise just a few minutes ago, I would've gone on thinking that.

[He's silent again for a few long seconds.]

Basically we're all bloody disasters when it comes to communication, aren't we?