If you suffer from chronic oversensitivity it might be due to a mood disorder or other mental disorder and sometimes can be helped with medication. If you were bullied a lot as a child or adolescent you could have suffered psychological trauma and you might benefit from counseling. Most people in the World are not classic beauties - take a walk around a large city and you will see that the vast majority of people have very average looks. It's rare to be physically attractive and looks are only skin deep. What matters is what's inside of you. Good luck.