It is hard once you have get into the habit of just being on your computer all the time, I used to do that quite often. Going out and meeting others can be hard, so I know how you feel. I have a few close friends but when I need someone to talk to and they aren't around, I do feel alone. Most of the time though I love my own company, I can learn new things and do what I want, I watch films, exercise/gym, go for walks, places I can enjoy without needing others....but sometimes it does feel awful when you have no one to talk to