What to do when they expect you to pick up the pieces time after time ?

[jellyinsideout]

My two Best friends no I'm not attracted to them before you ask ,but the guy likes the girl she says yes one minute no the next and they constantly hurt each other and me as a friend has to fix it all and then it happens again like a cycle and they won't get the message. It's about to happen yet again so what am I to do ? I know keep out of it but i'm a friend to both of them and it's difficult