Oh, Meryl. Swoon. Sigh. Smart, funny, alive, shockingly talented, and inspiringly joyful. Here’s the funny, playful, insightful speech she gave last week at Barnard College on happiness, success, fame, pretending, and becoming authentic. It’s a little all over the place, but it’s 28 minutes of Meryl. ‘Nuff said. One of my favorite parts: “I know I was…