"I want--" Oh, hello wall. His good friend, so lovely to have you prop him up. John presses his eyes shut tightly for a long moment before he manages to find some stability and purchase where he stands and in his stance as well. He sucks in a breath before focusing completely on Sherlock and the little halo of light that illuminates his curls from the doorway. "I want to be let in again," he says.

And isn't that the true heart of this whole problem? John could overlook and accept Sherlock's idiosyncrasies because those very things were providing him with fuel for his own sales. Human beings, no matter how good, are inherently selfish. John is as well.

Having only a part time Sherlock is like having just the edge pieces of the puzzle.

You can't get the full picture and you can't appreciate the finished work because there's no substance. What he has with Sherlock now is nothing.