Template:StubOne day she is your best friend, the next your ex-best friend. Plus, she is always mean to you. Turn the tables by reading this article.

= Steps

Think about her past behavior and if any of it could get her in trouble! Was there anything that your ex-best frend liked to do, like pass notes or talk in class?
Watch her like a hawk for more of the same behavior. If she starts doing the passing notes or talking thing, tell the teacher.
If you don't want to get a reputation as a tattletale, tell the teacher something else. If she is talking say "I can't hear you because [name of ex-best friend] is talking." It will work like a charm!
Do this all the time, and get your ex-best friend in to trouble a lot. She will get a reputation as a "bad" girl.

Find a person who is nice. Check if they will be your best friend.
If your ex-best friend goes to the park, go with your new best friend. Have a great time.
Go every where your ex-best friend goes, and do every thing with your new best friend, that your used to do with your ex-best friend.
Your ex-best friend might find a new best friend and try to do the same thing to you. Ignore her and tell your new best friend that she is the most fun best friend you've ever had.

Follow your ex-best friend to where ever she goes. Then listen in on her conversations.
If she talks about gossip, tell the whole school. If she tells a secret, tell the whole school.
Do this until she thinks one of her best friends is telling.
They should get in a big fight.

Tips

Tell her crush that she likes him.
Ask her crush out or flirt with him in front of her. Hug him or maybe a kiss him on the cheek.
Try to move on and find new friends, do not hold a grudge against her. If you do not know why she suddenly stopped being your friend, confront her about it. This will clear a lot of things up.
If your ex-best friend says she wants to be your friend again, don't believe her.
Always find out the dirt on your ex-best friend but don't have anyone assume that you hate her even though you do.
When you're doing this, avoid your ex-best friend when your aren't getting revenge.
Be friend with your ex best friend and take revenge secretly with your other best friend.
Do something cool with your new best friend, like make a trademark or song or handshake and always do in front of your previous friend.

If she is your college roommate you have easy access to all her belongings, if not you can do similar things without her knowing to her belongings in school, or any time you can get your hands on them.
Dip her mascara wand in toilet water.
Lick her food, put it on the floor to collect dirt and then carefully put in back.
Spit in her soda, squash or any liquid she has open. Remember to shake it to disperse the spit well, so she doesn't notice.
Put an alarm clock under their floorboards and drive them crazy.
Hide items of her clothing. Eg. Put her favourite shirt under her bed or down the side that is against the wall, it will drive her crazy trying to find it and she won't be able to trace it back to you as its in her room.

If your teacher finds out, you could be in big trouble.
You could get all your friends to turn on you because they think you shouldn't get revenge.
Your ex-best friend could use any of these methods against you.