Is it normal not to believe in love?

I am 23 years old.. i was born in a family of coloured people as we call it here( a mixture of white and black), iam the darkest in the family, and most of the times i feel like i dont belong there, im always compared to my sister, and im always asked questions such as : are you really sisters? or why are you dark and she is lighter? growing up i always noticed that my siter got a special attention from my simblings. i decided to be independent, have my own way and deal with my issues alone. but even at 23 the feeling of been rejected hunts me. and is affecting my self-esteem, and also what i perceive love to be- i dont believe in love nor that someone can actually love you for who you are... i want to be free, learn from my past and move on- how do i do it? Rt