Illinois  |  Personal Injury

My Supervisor and I have been accused of having an affair by one of my co-workers. This is absolutely untrue. They have absolutely no proof. I believe this is happening because there was talk I would be getting a promotion. Is this ground for harrassment? What can I legally do to end this. My supervisor is a married man with children. His job is on the line as is my moral character. what do i do?