Can friendship lasts forever?

Can friendship lasts forever?
A group of my friends which have 5 of us
We were so closed in one time
The friendship is developed from our ex company

Lately i realize A & B is having some conflict
C & D is having some misunderstanding with each other as well
And 4 of them complain to me!!!

What should i do?
It seems like i'm Switzerland and I'm stuck in the middle

0 who am I - questions: