Baby,
You are not hopeless. Listen to me, I have felt the same way you do all of the time. People were so mean to me. Sometimes they still are. I grew up extremely shy, and to this day I wonder if it was some form of Autism. Aspergers Syndrome is a very mild form of autism that is most apparent in social functioning. I don't think I have it, and I'm not suggesting you have it, but it helped me to read about it because I could relate to the social awkwardness and the negative perception of others.
What really, really helped me is realizing something so simple and yet so true. I may not be socially adept, but I am a human being, worthy of dignity,the respect that I earn, common courtesy, and yes, compassion and forgiveness. This is not negotiable or disputable, period. Anyone who does not want to give me these things does not deserve them him/herself, and I dismiss them as unworthy of the confusion, pain, anxiety, sorrow, self-consciousnness, embarrassment, insecurity, self-hatred, etc., etc. I don't deserve any of the above inflicted upon me for no good reason and neither do you.
Finally, it was VERY unprofessional of your boss to act that way. So, who is this rude, arrogant, mean-spirited snob to judge you? Heck, I'd much rather work for you than your boss any day!
Buck up. You are more likable than you think!