Try a change of scenery, avoid doing things and places that remind you of your roommate. Try to study at a different location, maybe the library or a starbucks.

Try a change of scenery, avoid doing things and places that remind you of your roommate. Try to study at a different location, maybe the library or a starbucks. Find a different place to sleep too, crash at friends maybe. Don't mourn or even think about what happened until you've hit your milestones. Thinking even a little will open a flood of emotions. Play a game or something (flash game / mine sweeper / super mario) whenever you need to take a break or when you lose focus, but don't let your brain go idle. Get more sleep deprived than usual, so your brain will be a bit less reflective and you will fall asleep quicker too. Oh, and try to completely avoid news sites and all that stuff. At least, this is how I handled it when I didn't have time to mourn. Your milage may vary. My condolences and I hope you'll make it through this period.