Almost 28 still single?is there something wrong with me?

ive never had a boyfriend,see im just about 5'1 and quite flat chested and have a birthmark under my right eye.But i swear i never did things to hurt other people and everytime i fall in love the guy that i like sometimes back off and makes a lot of excuses.It hurts me a lot that no matter how i accept the way i am the people around me cannot.It feels like being deprived of loving someone and being loved back.Is this how the reality is?