Are these friends females? What is his gripe w/ the relationship? Do you have children?
Divorce is NEVER fair--life is never fair. You have to look out for yourself in this b/c believe me, he isn't going to be looking out for you. And I promise he isn't worried a/b being "fair"...Get a good lawyer that you trust and let him/her guide you through this. Don't be a softie now or you will regret it and have it live w/ it the rest of your life, esp if you have kids.