I've been there. Almost droping out of school, missing classes, having few friends (most of my long time friends lived in other countries) and couldn't share it with my family because they wouldn't understand, and had their own problems.
How did I get out of it ? I tried and failed launching three startups. I wanted to focus the whole energy on achieving something .. and even if I failed to, this kept me "alive".
I think you should find something (or someone by luck:) ) you really love and focus everything on it.
As a conclusion, I would like to share with you two things :
- "To strive, to seek, to find, and not to yield" from Ulysses