BFFs and Adulting : Why is it so Difficult to Make Adult Friendships? Another common theme I tend to hear from clients has nothing to do with romantic relationships, but rather adult friendships. As I am writing this, I immediately think of the movie I Love You, Man staring Paul Rudd and Jason Segel. Although comical, the movie actually has a lot of truth to it and while you may find yourself laughing your butt .