What Are The Symptoms Of Social Anxiety?

Iately I have discovered something about myself. I have a group of friends, and often I will accidentally say something insulting to someone. Sometimes its people who arent really that close friends to me, but if I do something to make them mad, all I can think about is that that person is mad at me and I try to make everyone not mad at me. My friends tell me not to worry if someones mad at me, but it bothers me. I believe I may have a social disorder . I cant stand when people are mad at me, and I have to try and make things right. Is this a disorder? If so, what it is it called. Thank you