That was so incredibly sweet. I love a good, old-fashioned courting, although getting married after a single year of dating seems a bit quick. But never mind that, this was an amazing and lovely story that just warmed my heart. I love how genuine it was. You wrote some great lines. My particular favorite is this one:

Not long after he had Sherlock had fit themselves around each other...

It seems like a wonderful way to describe John and Sherlock's relationship. (Also, I think that first had should be an and...?)