1. You're not having a good time. What have you tried to do to fit in? What about the school isn't a good fit for you. Just remember going to a new schools means you're going to have to start all over again.
  2. You are homesick for friends, boy/girlfriends or family. Making the move will only compromise your education.
  3. The work is too hard. You probably aren't taking the right classes. Re-evaluate your course load and major. Research professors ahead of time, make sure you're not getting a dud.