>>1 First off: School is bullshit.
Nothing you do there, socially, will matter by the time you're in your twenties.
So don't worry too much about friends or what people think.
You are there to learn, to grow, and to better yourself.
If those people want nothing to do with that then you must want nothing to do with them.
Second: Online friends are great and some of the best people I've met have been on this site, so as long as you follow the rules and pay attention, you will make great friends.
However, it is also important to human beings that you have at least one physical friend.
We are pack animals and tend to get pretty useless on our own for too long.
Third: You're young.
Have fun while you can.
Focus on making you happy above other's.
You're the one who has to deal with yourself the rest of your life, so make sure you're someone you can be happy with.