Just stick to your school work because the less time youv got to feel depressed the better then when you get home hav a smoke(weed). If i hav a smoke once a day im usually fine. I too get really bad waves of depression (without weed). They come and go. Dont see life as a burden its an experience that chances are you're only gonna get once.In the end in my mind ther is no point to life but i may as well enjoy it while its here.