And we know that for those who love God all things work together for good, for those who are called according to his purpose. Romans 8:28, NIV
Do not allow other people dictate the person that you should be. Be happy with the person that you are today. If you look closely, there are probably a million things that you can be grateful for. You only need to embrace the life that was given to you. The more you love yourself, the more you can relate with and follow through with your vocation.
Do not let hurtful words and discouraging events let you think badly about yourself. Everybody is unique. You are blessed with your own set of capabilities. For example, your sister might be known for her brains, but you might be blessed with more athletic features.
Do not hate yourself because you are different from the people around you.We are all special beings that God wishes the best for. Embrace the person that God made you to be and appreciate the life that you have. If you are unable to accept yourself for who you are, you will not be able to follow a higher calling.