That is harsh. My children call me fat all the time just joking, but I know it is true. However I have never had someone come right out and call me fat. Use it as motivation and prove to that chick that you are and will be a different person.
I wish you luck in your goals and remember you can do this.
Started at 205 lbs
Goal 1: Be under 200lbs End of August 2013
Goal 2: Be under 165lbs End of September 2013
Goal 3: Be under 150lbs End of November 2013
Goal 4: Be at 135lbs End of January 2014