Your characters should be holding a grudge, possibly several of them. Not against you, of course, unless you’re George R. R. Martin, but against other characters. People that they could reasonably hold a grudge against.
I was thinking about how I owe some guy at my school named Nate a big FUCK YOU for something he did earlier last semester (deets here towards the top) and I realized that I am definitely the kind of person who holds grudges. However, my characters aren’t. They don’t remember that one time that girl got them detention in 4th grade for something they didn’t do or the time their “best friend” decided to ignore them for two year to join the popular kids. Now, just like not all people hold grudges, not all characters do. Some forgive and forget.
However, I think it’s much more fun not to have a character forgive and forget. It can give them motivation to do anything, really. Need your character to get to the next city over for the plot to progress? She has a grudge on an old bully and wants to go make him wash her car. Need your character to be caught by the hunky police officer she’s going to sleep with? Have her being caught egging the house of her ex. You know the one, the guy who stole her cat and cheated on her, not the nice one who wore sweaters. Sweater dude made nice pizza.
Grudges are a great way to add some depth to your character. Is Judy more relaxed but Sally is confrontational? Show that through a conversation about how Sally hasn’t forgiven her first grade teacher for playing favorites and Judy trying to talk her into forgetting about it. It can also add humor to a scene when Sally recounts how incredibly unfair it was that Timmy was given FOUR gummy bears but she was only give ONE. (And yes, these can be adults. Adults can be petty, and all characters need flaws.)
So, Nate, in honor of upcoming Valentine’s Day, here is my gift for you:
So now I don’t have to worry about flipping you off it I finally see you around campus, because all of my followers now know that I’m crazy.