[gmantastic]

Being 16-18 and studying for your A-levels can be a horrible time - it was for me. Relationships with your friends start to change as you grow up at different rates (I don't know whether this applies to you), interests change, and you have so little energy it feels like an effort to get out of bed before noon. Some things that worked for me were hanging out with some different, more studious people, and learning the course material from books in the order I chose rather than following the course (I missed a lot of classes, but I would't recommend that). Make a game out of getting the grades that will be your ticket out of there! On a serious note, if you think you might be depressed, talk to someone (a doctor or counsellor) about it.