Ok, seriously?

I do not want to go to work. I'm not even sure I want to be a teacher anymore. Yesterday ended with a kid saying "fuck you" on his way out the door. In front of the rest of the kids. I am so embarrassed, and that pisses me off. Why should I be embarrassed for HIS bad behavior? I can't figure out what is happening with my emotions. All I know is I am really reacting badly to this