The best thing to start with is to sit down and talk about things with her. Find out why your relationship has grown distant. There could be a simple fix that you have not discovered.
get a new friend
You say "Best friend" but, if they were your best friend they wouldn't do this to you. I would try & move on, make new friends then see what happens.
You answered yourself when you said "your use to be best friend". Fickleness cannot be overcome but getting new friends can.
find new, real, friends. yikes! uh, ask your friend about it and tell her. if she just tells her best friend, you shouldn't remain friends with her!
Your friend has a right to choose who she sees, but it would be to your best interest to not tell your best friend anything that you do not want to have gossiped about. Your friend has to find out for herself that her new friend is a backstabber. Good friends are loyal (such as yourself) and waiting for your best friend to drop the new friend is the best thing to do.
First of all, a friend who steals anything is not a friend. Automatically. And a best friend stolen, and a girl friend stolen, are not friends either. Sounds like you need new friends. I would personally forget about it and get some more friends.
If your best friend lies to you a lot, then stop talking to him/or her and make *New* friends that do not lie to you.
Find a new best friend.
I don't see why not. Let friends be friends. I let my friends be friends with my enemies.
because you hang around your best friend find a new one.
You try to make new friends that like you for who you are and if you like them too. You guys will most likely become good friends throughout the year; good luck. Technicallly,you can make new best friends but if you liked the person as a best friend and couldn't live a minute without them,try apoligizing.
Well that depends, maybe he isn't your true friend and you need to find someone else to be your new best friend.