Need some advice

So I'm having trouble with a friend and her bf. They fight a good amount of the time and we all hear about it cause we're all friends. When they fight and break up for like a day or night, my friend always thinks I'm getting with her man. I keep telling her I'm not( trust me. I'm not. I have my own man) but like it's reoccurring. Idk what to do? It makes me feel so awkward.