Megan, you are a very nice girl!  Don't let that bitch get to you.  Take it from someone older and wiser 

 ...."arguing" via email almost never gets you anywhere...probably just in a deeper whole and more frustrated (been there, done that).  If she's a nasty bitch (which she sounds like) you shouldn't even want to be friends with her.  Just ignore her, and move on.  You can't be friends with everyone.  

  Not only that, you've never even met her right?  Forget her!  

  Just don't forget that WE love you!!!!  
