Well my ex/friend is roommate with her friend from high school they call each other sis and stuff. But lately they started fighting cause my friend doesn't like people smoking in the house. It be her sis friends that be smoking and what not. But my friend said they couldn't come over cause they are not respecting her and her rules. But I see that her friend posted on something saying negative things about her dirty and other things. I pretty much know I'm the only person who knows and is wondering should I say something or stay out of it. I'm really close with my friend.

Stay out of it. Don't feed the drama.