Coworker spreads rumor, what now?

I work at a hotel, I bring items to the housekeepers to complete rooms, I'm close to my manager because she help me get Saturdays off for school. She called me to bring her 2 glasses for a room and showed the door latch was broken so she call maintenance. The guy freak out when he saw me in the hallway, she's worried about him saying we are together, turns out he did. She told me he asked her out and she said no. What do I do? I don't want her to feel bad and we always work together. I told her he didn't see us doing anything wrong, this person helped me a lot and now she's stressed for her reputation and her position.