A/N: I've never written a Sherlock fic before now, so go easy on roughly inspired by Know your Enemy and Restless Heart Syndrome by Green Day. WARNING: Dark. Short. Sherlock's POV.

You had always thought you were your own worst enemy. Then Moriarty. Then Mycroft. But this you had never expected.

"I'm sorry, Sherlock. I never wanted to do this." your best (and really only) friend had said.

Right before he pulled the trigger on the gun he was pointing at you. Now you know your enemy. He was living with you, for God's sake! How did you not see this?

"Why?" you asked with your last breath. John Watson just stands there, before dropping the gun and walking away.

And then it's all over. John Watson. Only friend, only traitor.

A/N: I like reviews…