There's someone in your class you've been spending more time with lately. They're funny and interesting, and you like them. But you've also noticed some things that give you pause — they sometimes say sharp things about other people, they can be a bit unpredictable, and occasionally you leave a conversation with them feeling slightly off, though you can't always say exactly why. You're not sure if this is someone worth getting closer to, or if your instincts are telling you something important.