A girl was being mean to me, and i told my friend about it. But my friend is friends with a girl who is friends with the mean girl?

So a girl was being mean to me at school and i told my friends about it. And one of my friend is friends with a girl who happens to be the mean girl's friend. And i'm scared that my friend will tell her about it, and that girl might tell the mean girl. if that happens, it will be bad, what should i?