When you are in your room, do you communicate with people on the net? Do you play online games or chat on forums? I know lots of people see these things as bad for social life because sometimes people use them as a substitute for real life interaction, but they are great places to learn social skills and give you confidence in talking to other people. I know they helped me feel less isolated, and then when I did venture out, I felt happier dealing with other people because I did not feel such a 'loner'.