Okay, so I liked prodigal filmmaker Lena Dunham’s debut film, “Tiny Furniture.” It was quirky, original and totally captured the nebulous insecurity and waivering self-loathing you feel post-college. Now Dunham’s back, with a new series on HBO called “Girls,” produced by Judd Apatow and starring several of her “Tiny Furniture” pals. But this long teaser trailer? Well, I want to want to watch “Girls.” I do. But I don’t know if this is really doing it for me. What do you think?