What I would say

So the slutty trash whore (that's her new name) wrote me a nice myspace message. She proceeded to call ME a loser, say that I am overweight (i'm 105lbs), called me disgusting, and in detail discussed her sexual acts with josh.
Everything rolled off my shoulders except for the detailed sex details. That of course made me sick to my stomach and made her the pettiest bitch ever.

I will never stoop to her level. I have far too much class, I am far from a loser, Not at all over weight and a quite attractive if I may say so myself. Not to mention I am 4 times closer to being everything I want to be and getting everything I want from life than she ever will.

I can say with utmost confidence that if I were half as bitchy as she is I would have texted her months ago calling her out for the trash that she is. I didn't call her, text her, stop to see her, email or message her. I did nothing because I am above that. She hurt me with her actions far more than I could ever have done to her.

I don't think she realizes that SHE was the other woman, although at this point with her I.Q. and immaturity I am not sure woman is the right word for her.
I am pretty sure she is the one who is heaver than me, and who never graduated high school and is not attending one of the top 20 universities in the country.

If I did say something to her it would go a little like this...
Girls like me get what they want out of life, the job they want, the friends they want, meet the goals they have and find the love they want. Guys want girls like me forever.
Girls like you are the mistakes boys make. Girls like you end up with an std and working in a restaurant till you die.

Who's the loser now Bitch?
(don't worry, I would never send this to her. There is no need, life will speak for me)