Couples..

So someone feel me in on the ettiquette for being friends with another couple. J's best friend was dating this girl who quickly became a good friend of mine. Well this weekend some stuff happened and they broke it off. How do we all stay friends? It's already gotten difficult and I really dont want to be in the middle, but I'd like to stay friends with all the parties. I'm just confused on how to make it work.

Lay low for a while till the storm blows over??