Someone who is obese(fat) is basicaly harming your own body slowly. To me, it seems like you are not taking care of yourself. Your not being smart about healthy living and living life longer that you should be. Anything over 30% body fat is harmful and over 60% your killing yourself faster.

Looking fat/skinny is basically the "cover of the book" or "first impression" we percieve in our society. Blame the media. But I'm sure you have a great heart & personality that people yet to see because of your looks.
Get in shape for yourself, not for others. Good luck