Guitar playing is seriously something worth looking into. The main reason I picked one up was to 'escape reality' but after a while it just turned into a vent of the bad things in life, and a boost in the good things. It lets you expand emotions, store them in your instrument.
I'm probably the youngest one posting in this thread, but I must say, do NOT turn to drugs. I tried it, and honestly it feels great, I'm not gonna lie. But after a while you realize just how deep you dug yourself... You start getting dependent, things start becoming harder to feat, your motivation crumbles and your general 'tone' will drop through the floor.
Talking with people you get along with helps too, and I don't mean any deep emotional conversations, just nice friendly chats with old friends really helps ease your mind.
But I think the main thing to consider is point of view. Take a look at the life around you, you'll realize just how good you have it compared to some others. Maybe not around your campus, but read about stuff going on around Toronto, it will shock you. Some of the things people have to deal with daily is just insane.
A lot of us here are willing to help you with your doom cloud, and feel free to drop me a line anytime if you must, I'm always up for a chat.
Keep up the positive attitude and things will start to get better, we'll all here for you

~Bryan~