[He can't handle it but he never wants this to stop either, trembling in his hold, hugging him back. It kind of hits belatedly how this means not just that Shiro feels this way about him but that he knows Keith's feelings too and... god.]
Shiro... [More than ever, more than his own doubt or anything else, he wants to answer him properly, say what he's feeling, because those words mean too much not to.]
You know I - [You know, yes, wow, but even if you didn't he'd still... He's a mess and yet this he feels without any uncertainty at all.] Me too. Me too.