This is one of my favorite looks John gives Sherlock. Things are (sorta) back to normal and he’s letting Sherlock know that they need to go face the press; but then he sees him, stops, and steps back a little as his eyes trail down Sherlock and little half-smile forms on his face. It’s such a tiny moment, but it kills me! If I’d never seen this show and someone just showed me this gif and asked me what was happening, I’d swear that this was a man walking in on his lover while they’re looking particularly gorgeous or something like that. There’s such a sense of awe, as though, for a moment, John can’t believe that this is real; that the miracle he asked for came true; that Sherlock—the best and the wisest man he has ever known—is alive and back where he belongs.
First off: just because you do not read them as ‘gay’ does not make other people’s opinions invalid. Many fans who have watched the show believe that Sherlock and John love each other (in a romantic sense). There is nothing wrong with that.