I disagree with u 
I wonder where you got these information from. Total crap.
Personally I know people who are overwieght and yet are still very
confident of themselves, of who they are. And for your information,
a person having more or lesser friends have nothing to do with them
being fat or not, it depends on his/her character. Just because
they are bigger in size doesnt mean they would have lesser friends,
(only shallow people will have this thinking), in fact most of them
are jovial people and are fun to be with.