Today’s advice question comes from Isabelle, who writes: I feel like I’m behind everyone my age, and I'm starting to have trouble socializing with my friends. They all know and chat about all the latest celebrity gossip, all the best iPhone apps, and all the good books, but whenever they ask me about that stuff, I have no idea what they’re talking about. I am not really interested in that stuff and I don't like to waste time getting updated on it, but I still want to be with my friends. What…