Someone please tell me why?!

            Why do guys break up with a girl that is pretty and all around better
         then goes out with an ugly, nasty, STD infected, stupid girl

                                     To go from this

                                                      To this
  

                                                 From this
 
                                                 To this

         I don’t get it

          And then you try and be nice to them
        And they are just complete jerks
        They treat you like hell
        Like you were the one that dumped them
        And like you ruined their life
        Not the other way around
        Oh No!!
        The ex’s never do anything wrong!
  
        sorry just had to vent and ask.. .