The Wedding Planner

Sherlock has put every ounce of himself into giving John and Mary the best wedding anyone’s ever had, a wedding that will say to John: I love you. I love you so much, that if it makes you happy to marry someone else, I will be here for you. I will not only watch that happen, I will make it the best day ever.

OR: Sherlock is an idiot. John is only a bit less of an idiot. There is a wedding.