i wouldn't say i am depressed, although i would say my mum is, knowing your dad is dieing of liver failure, cancer and a few other things does make you depressed, although i deal with it all by just doing other things, coming on here, looking at cars, etc etc.
i would also try joining some thing that takes your mind off it, im in the life boat rescue service and do shit loads of mechanic courses at college just to take my mind off it that would be my advice