I'm going to say the opposite...get out more!
Last year I felt depressed, and spent a lot of time in my room on TSR. Then in the summer I had a friend stay with me, and we went out and did loads of stuff and I had the most fun ever. We'd keep up with the listings in the local and student press, spend the evenings in cafés, bars and concerts, find open mic nights, go to the cinema, go out to places for the day. In the evening we'd gatecrash houseparties and meet people, and I made a lot of new friends, so I'm much more inclined to head out with them now rather than stay in. I'm even selling my TV, as I never use it any more.
Now my friend has gone home, but I'm still trying not to waste my evenings at home. I go out with my new mates, we've joined uni societies together, so I'm still getting out. Seriously, I don't know if you're at uni or not, but find the local what's on listings, grab a friend, and go out and join a society or attend an open mic night or something. Being stuck at home is no fun (I should know; I'm stuck at home til Weds as I have no money, and even then on tomorrow I'm volunteering and on Tuesday I'm playing poker in a freeroll and then going drinking after on my (hopeful) winnings!).
Seriously, get out and revitalise your social life, you don't know what you are missing!