HOW CAN I KEEP LIVING IF I SEE NO PURPOSE FOR MY LIFE?

I CANNOT SEEM TO GET IT TOGETHER. I WANT TO BE PRETTY, HANDSOME, HEALTHY AND STRONG TO FACE LIFE'S PROBLEMS AND I CANNOT SEEM TO HELP MYSELF TO LIVE A GOOD LIFE. ALL Y FRIENS ARE HAPPY AN PROSPEROUS BUT ON AND ON I DRAG MYSELF THRU LIFE, CRYING ALL THE WAY! WHAT O I O? HOW CAN I BE AN EXAMPLE FOR MY FAMILY? WHY CAN'T I SEEM TO LIVE A HAPPY LIFE?