That's too bad. If you aren't homeschooled, which you probably aren't, go up to a new person during recess. You will find that that is the easiest way to make friends. If you live near someone your age, ask you and their mom about walking to school together. You might also consider asking a parent if you could  do Facebook or Twitter, but if you have parents like mine, you're lucky to be doing the CB. Also, talk with a parent about this. They may suggest enrolling you in a sport or in music lessons, or something that you're interested in where you could make friends with people.

P.S. I don't think that it's bragging to say that you're a genius. I fully understand what you mean by saying that.  Congratulations on being a real-life genius! ;)

Find a thing you like, for example, a musical instrument, and join a group or club related to it!  I found that to be a good way to meet people who have the same interests as you.

In re classes being too easy, you can learn things on your own time.  Teachers can't usually talk about the interesting parts of a subject because they don't have enough time, but there are a lot of cool things you can find out!  Khan Academy or something like that is good for this sort of thing.

Just go up to someone who seems nice and start talking to them. That's what I do. 

Blech. I threw up on Friday night. I hope I'm not getting sick. 

S.E., any activity where you're working with other people is an excellent way to make friends. Do you even talk to anyone at theater?

@ S.E.: Oh goodness, you and I are in the same boat. Except I'm not a genius by any stretch of the imagination! (And that's not bragging at all. You can't help picking things up better than other people. Bragging is when you flaunt it, and believe me, you don't.) I can't make friends either. I have no social life, and I often feel lonely. Really lonely. I don't do Facebook or Twitter either, so CB is my only escape, like you. I find it's hard to make friends cause people want you to be like them. If you're not, you're not accepted. Don't let that depress you though. In fact, just the opposite. I always try to remind myself the reason I don't have friends is because I'm different. And I'm GLAD I'm different! Girls today can be shallow and self absorbed. I'm quite grateful God made me different, and dislike the stuff they like. Just always keep a watchful eye out for those people who feel like you. You're not alone, and I'm sure there's someone who's waiting for someone to reach out their hand to them. 

@ Mag Fan: Don't feel immature or stupid for playing! I think it's wonderful you take the time to play with your little sister. It's not dumb at all. I watched this sppech that Jacqueline Emerson gave called: Hold Onto Your Inner Childhood. She talked about how she would play with "Chipmunks" with her niece. She was talking about how it struck, why did she feel ridiculous playing this? If her five year old niece could think this up in ten seconds, and have a blast, why did it take her ten minutes to finally get into the game? Age has absolutely nothing to do with it. You can still enjoy playing "babyish" games. It doesn't reflect badly on you. In fact, just the opposite! And trust me, those moments with your sister are the kind of things you'll back on as an adult more than anything else. Don't let yourself regret not spending time with her, or playing games.  Enjoy it to it's fullest while you can.

Do you hate absolutely every kind of music?  Maybe you just haven't found the right kind of instrument.  If you like to sing, there are community choirs.  I've found that if people like the music they are playing they enjoy it much better.

Thanks!