My BFF dosn't listen?

my BFF and my other very close friend don't like each other. that other friend said bad things about her. they were true, but not exactly true. my BFF thought that she tried to break us up! i agreed then but now i realized that it's not true. i tried o exclaim to her, but she doesn't listen! she doesn't want to! i can never make them friend and it's hard for me to be with hem like this! my two best friends HATE each other! help!