Helping someone with parent's divorce...

My fiancé's parents recently revealed that they will be separating. It wasn't necessarily a suprise you could say, but it's still extremely hard on him and his brothers... (I mean amd me too, we've known eachother since 2nd grade so I know his parents like my own too)

What are some of your pieces of advice or tips if you've gone through something similar?

I want to help him so bad, but I think sometimes I just have to leave him be, or be there for him when he needs me. But what could I do to go above and beyond with it? (To be a great fiancé)