Please advise...I can't stop playing video games!?

I'm a sophomore in college, and it's pretty sad. I just never got used to the whole "college" thing where you actually have to study for classes. I breezed through high school with a 3.9 gpa by studying for tests basically 1 hour before we had to take them. Now I'm doing bad in college, but I can't force myself to study!

I'm a computer science major, and I know quite a lot about computers. When I'm not playing video games, I'm on newegg.com looking at the latest graphics cards/processors :P. But I waste so much time playing computer games, and as I think about it when I'm in bed, I hate myself so much for it. People say playing sports and board games can help, but sure, I go play tennis and soccer for 2 hours, and then I go right back onto video games when I come back!

I was so frustrated once, that I code a virus on my own computer that automatically terminates any games when they run. But a day later, I promptly cracked and erased my own virus. Yes I know - it's so pathetic.

If I don't play computer games, I feel so bored with life and depressed. But when I do play video games, I do bad in my classes and hate myself for it! Is there anything that can help me??? (And no, I can't go get a girlfriend because I have no life and horrible social skills. And...no, I can't go play a musical instrument because I already play piano and I can only do that for about 30 min)