What to do about gossip?

I can relate to your situation. I too, have a tendency to speak my mind, however I'm not ashamed of my thoughts because at the time that's how I honestly felt, nobody should tell you other wise, and "if" that labels you a creep in their eyes then so be it, that's their opinion, if that person would go as far as to "slander" your image, then obviously that person has insecurities. Congrats! You have successfully gotten under their skin. Don't fight back, just smile and turn the other cheek :)