the-7-percent-solution:

Because of the Sherlock blog posts floating around we now have a good inclination that Sherlock loves life and allows himself to have those happy feelings when he’s high. Keep in mind he only takes when John is out of the picture. Because he loved life and was slowly allowing himself to have those happy feelings when John was by his side. He needs to feel, he needs to love. So it’s going to be the drugs or it’s going to be John that gives it to him.

He’s always needed one or the other.

We know which fix he’ll be craving in S4:

*Mycroft holds up the list of drugs Sherlock took in TAB*

“No need for that now. Got the real thing.”