That happened to me. The more I denied it, the less they believed me. I just put my chin in the air, dealt with the lie, and waited for all those gullible gossiping fools to start talking about someone else. It hurts to be lied about. People are fickle. Soon they'll find someone else to talk about and this will be old news.
In society today we are intrigued and enthralled by drama and gossip and sadly most of it is here say and false. If it's true then own up, if it's false, then keep maintaining your innocence. This he say, she say, is for the birds. Whenever my GF puts on Inside Edition or shows like that, I leave the room cuz I don't need to know or care about what other people do in their private lives unless it is directly affecting me. Good Luck!!