"Words only hurt if you let them!"
I realize that your first reaction is to say, "Yea, right". I get that a lot when I say that to someone. But, by letting someone else's opinion hurt you, you're giving them control over you. Not just you, but your emotions as well. You're also giving them control of your opinion of yourself. There are plenty of things that we have no control in life,so why simply give up control over your emotions.
Usually, others only say hurtful words to make them feel better about themselves. They thrive when others feel bad, most especially when they are the cause.
The only opinion that matters about who you are, is yours!