You know what happened. Even if you don’t watch the show, you know. If you don’t know, LEAVE NOW. This is a spoiler laden response to Thursday’s Grey’s Anatomy. Twitter was overwhelmed with screaming, crying fans. Facebook had Grey’s Anatomy trending. And the fans of Grey’s Anatomy limped through Friday broken, mourning, confused and the biggest one: Angry. Derek is dead. Let me start things out by saying I’m actually not angry that Derek died. Really, I’m not. Life rarely gets happy endings so yes, it’s nice when it does happen, but the reality is that it often doesn’t. And in a show that has never shied away from death,…