help!!

okay sooo my two bestfriends are dating, but my girl bestfriend doesn’t really want to be with him and tells me all the time she wants to end things but don’t wanna break his heart. but on the other hand, my boy bestfriend is in love with her. i mean DEEP in love. what do i do bc he asks me all the time ab her and idk what to tell him. and he’s also insecure bc he’s been cheated on before and i can’t just tell him that his gf don’t wanna be with him. what do i do???