I agree with justfloating. Isolation is much, much easier. You don't have to explain yourself to anyone nor do you have to 'lie' to them and tell them you're fine because you don't want them to know your personal problems. I always seem to isolate myself because I don't want to let anyone else in. No one is around to judge me or make me feel low and I don't have to pretend that everything is fine. I'm in college as well and I know it gets difficult to pay attention in classes with so many thoughts going through my mind. It's a struggle sometimes just to get out of bed because I feel like people can see right through me and see my sadness.