Let Me In is ponderously stylized. Director (and screenwriter) Reeves approaches the film–about a twelve year-old boy (Kodi Smit-McPhee) who befriends the new girl in his apartment complex, also ostensibly twelve years old. Chloë Grace Moretz is the girl. She’s not just a girl, she’s a vampire. Reeves shoots it kind of like “She’s a…