It's funny. When I was 17/18 and in high school. I literally did nothing. I would go to school, and go home. I would hang out with friends rarely. I spent a lot of time on my computer and on aim. But I never felt lonely.
When I went to college I dormed. I would pretty much go to school, play video games, and talk to friends a little bit. But again, most of my time I would spend playing video games, and I never felt lonely.
Now that I look back I HATE myself for never feeling lonely earlier, and making a far bigger effort to socialize.
You may feel bad. But I promise you I wish I felt that way when I was your age. Sometimes you need to feel the pain early in life, rather than have it build up into something huge. I would gladly talk to you, but I'm 30. If you don't care feel free to add me on skype. Username itwasez. Just say you're from the forum and your username.