Sometimes we hate ourselves because of the criticism we received from other people. We become emotional and tend to forget our true self, trying to please others but end up hating ourselves. 
So, how can we find happiness?
Here is the story of a girl who wanted to find true happiness in life.
A teenage girl had an older sister who is very popular in school for being talented and always stays on top of her class. Since she was just an average learner, some of their teachers and schoolmates tend to compare her to her sister. 
She got jealous of the fame and attention that her sister has. So,  she followed every advice given by the people around her to be like her sister.
Finally, she had the fame and attention she wanted, but deep inside of her she felt unhappy. She wanted to be loved by others, but she forgot to love her true self.
One day, she went to church and approached a priest. She confessed that was so jealous of everything that her sister has and she has done everything to be like her sister. Then she asked the priest, "Why am I still unhappy?"  The priest smiled and asked her: "Do you know the secret of true happiness?" she answered "No". 
Then the priest said, "The secret of true happiness is to be contented of what you have and most importantly is loving yourself for being who you are."
She began to cry and realized that she had forgotten to know and love herself.
From then on, she explores and discovers more about herself than trying to be like somebody else. 
By loving her true self, people started to love her for being who she is,