what she means:sherlock never even got a chance to tell john why he had to fake his suicide and john ended up forgiving him anyway, which was nice but just another of many examples of their inability to communicate with each other, the distance between them being perpetuated and widened by a seemingly endless stream of similar miscommunication -- almost always being one of them doing something out of love for the other, and the other failing to realize that it was out of love while the first doesn't even try to make their intentions more apparent (i.e. the fall, of course, and john's whole blog, etc, etc) -- and all these stupid misunderstanding create an aggregate entity of such obvious mutual love and affection which can only really be seen in its whole from outside of their friendship/almost-relationship, ultimately leaving them in the dark about the very present mutuality of both's feelings for the other while leaving it clear as day to mrs. hudson, mycroft, irene, molly, the gay barkeeps, angelo, and everyone else who meets them, even mary for christ's sake.
A hero was taken away from this world many years ago, but his memory, spirit, ideas and music remain in our hearts forever. Thank you for all these years of beautiful lyrics, songs, thoughts and teachings. You’ve changed the world within a short life. You will be remembered by countless generations, just as you are now. May your beautiful soul rest now in a place where nothing is real, and there’s nothing to get hung about. We love you, nowhere man.