I can't live up to my older brother's standards?

LISTEN SWEETIE...DO NOT TRY TO LIVE UP TO ANYONE..NOT NO ONE...YOU ARE FINE JUST THE WAY YOU ARE....YOU HAVE TO PROVE NOTHING TO NO ONE..IF YOU WANT TO GET FIT..DO IT FOR YOURSELF..NO ANYONE ELSE...OKAY..YOU MAY NOT BELIEVE THIS BUT YOU ARE GOING THROUGH A CHANGE OF LIFE!...I KNOW IT SOUNDS CRAZY BUT YOU ARE..HANG IN THERE IT WILL FADE UNTIL YOU HIT..21!..GOOD LUCK!