Dear Gran True Blood “Evil is Going On” Sundays, HBO, 6PM Written by Alan Ball Directed by Anthony Hemingway “Gran, I miss you.” —Sookie Stackhouse Dear Gran: I’ve got a real dilemma here. On the one hand, there’s my first boyfriend ever, Bill the Vampire. He’s sexy, he loves me, and he’s a great dancer. But it turns out, he set me up on our first meeting, allowing two psychos to damn near beat me to death so I would survive only by drinking his blood, forging a sexual bond between us from the first moment. How do I know…