Creating believable relationships between two characters is not just important for romance. If you want people to believe that your characters are best friends, you have to work just as hard at it. There must be good reasons why they’re so close and why they’re working together toward a common goal. In real life, there’s usually some sort of event that bonds two people together and makes them closer than they were before. I met my best friend when we were forced to play kick ball during middle school gym and we were both TERRIBLE AT IT. It might seem like a simple event, but considering our ages, it was the most pressing issue during that time. The point is, there should be some sort of bonding event or a reason why two people are friends. Make a point to explain some of it and not just say, “they’ve been friends forever”
Here are some more general tips when describing friendships:
-If your characters have been thrust into some terrible situation together, be sure to explain why they’ve bonded more than other characters. Maybe they both fight well together or understand each other in a way no one else does. There has to be that moment when they both realize they can benefit or enjoy each other company more than any one else.
-The two best friends share some common ground. Is there an event from their pasts that allows them to bond easier than others? Maybe they both share a traumatic childhood OR it could be just as simple as them both sucking at Math. This is something you can play with.
-When the friendship has already been established, make sure you explain what they normally do with their time together. Do they have rituals that only they do together? What are their favorite activities? How do they interact with their other friends? These actions dictate why they’re still friends and how they’ve been friends for so long, so they’re just as important.
Obviously, there’s a lot of depth to friendship and it shouldn’t be taken lightly. Building these relationships are important, not only for understanding the characters you’ve created, but exposing the personality and motivations of the protagonist. Make each character and relationship count.