Okay, okay, here's a basic question of tjlc: how do you know that John loves Sherlock romantically? (I've seen so many posts about how John doesn't love Sherlock back it's frustrating…)
Ugh, good question. For me, it’s in the little things John does for Sherlock: taking care of him, offering his praise, dropping everything for Sherlock… just basically being Sherlock’s One Reliable Person.
I think also because John had basically given up dating in S2 because John had everything he pretty much wanted with Sherlock (minus a few things, but he seemed to be okay with that). He had accepted the life he had chosen.
Plus, let’s be real, John’s ridiculous blog is so romantic… Even Sherlock mentions it himself:
SHERLOCK: The record of our time together. Of course, he does tend to romanticise things a bit, but then, you know … (he looks down at John and Mary and half-winks at them) … he’s a romantic. [X]
The fact that Sherlock knows John himself is a romantic speaks a lot to how John has treated Sherlock throughout their relationship. Sherlock may be melancholic in this episode, but he has learned enough to understand how romantic John is. If SHERLOCK thinks that their relationship had been rather romantic WITHOUT the romance… well. It gives me hope that they are going to have a very beautiful relationship once they both dig up the courage to do it.