everything changed

everything changed. all my friends, i mean their syle, personality and all about them.
untill i found i photo of my old best friend he used to be so fat and short but now? O.O omg he's so tall and look so cool (i have to admit he's handsome now -_-)
and all my friend change their appearance to be better, i look of  my self. i've got nothing changed on me.
should i change my appearance or even my attitude?
i wanna be like them :( changes into the good things