Is it normal for my best friend to be really mean?

It bus normal but not nice you should stop bein her friend

Yerp it is normal...I got a bitch like that in my life before...my friends avoid her ...now she is gone from my life, migrated to thailand...

Here's an idea... why don't you stop being her friend?

Its not nicr and not cool, but i must say that at least wit girls theres always a girl lije that i the group of friends... It always happens it is normal

It sounds like she's not really much of a friend. Do yourself a favor and either tell her how you feel about it, or just go your separate ways. I can't imagine feeling comfortable in the company of someone who treats me like crap all the time, and acts like they're 'the boss'. Find a new friend. Think over what true friendship really is. There's no reason for people to treat other people like that whether you're best friends or not. She'll never be appreciated for a bad attitude.

My friends the same -.- just start to ignor her and see what happens... Any money she will come crawling back for the attention like mine did xox

She sounds like a horrible person. However, insulting others is probably just her defense mechanism. What I mean is that it's possible that she insults others first so that they won't insult her at first sight, thus she feels better about herself. Try talking to her and see what goes on in her life. Her insults could be a cry for help as sad as it sounds.