Hey, guys i'm writing a story with two characters that are roomates and close friends, but i don't know how to make their relationship seem convincing. They share some things in common, they're both underdogs and their personalities complement each other (one is a shy and calm extroverted and the other is introverted and "chaotic"). They're also kinda jerks and do stupid stuff together. I still can't make their interactions feel natural. Their scenes together just don't flow. What should I do to fix it?