Good or bad?

Recently I've been told by many people that I've become thinner. Honestly I'm happy to hear this. Which girl in this world doesn't like to be slim? But is it good or bad? Thin = slim? Not really, right? Somehow I don't know why I've become thinner. I didn't eat less or exercise more. Not even eat on time. What has happened to me actually? Should I be happy with this? I don't know~