Maybe in the fanfic, Majin Boo has done something extremely unforgivable to Bulma, like harming her family or friends. This could be the reason for her inability to forgive.
I'm sorry, I haven't read a specific 'bulma wintt forgive majin boo fanfic' so I can't recommend one directly. You could try searching on fanfic websites like FanFiction.net or Archive of Our Own.
One possible plot could be that Majin Boo has done something really bad that affects Bulma. But then, through a series of events, like Majin Boo saving Bulma's life or showing remorse in a very genuine way, Bulma begins to consider forgiveness. Maybe Majin Boo has to sacrifice something important to prove his change of heart, and in the end, Bulma fully forgives him.
It could be that Majin Boo attacked the city where Bulma lives. Her home and the people she cares about are in danger because of him, and that's why she can't forgive him.
Hello! Seeing that you are looking for a novel related to the Archmage, I will help you immediately ~ I recommend a novel called "Dragon Slaying Archmage". It is a fantasy novel about the continent of another world. The plot of the novel was about a child who had no parents. He was born with a pair of strange eyes and created a particularly powerful spell. He wandered among all the monsters on the Malfa Continent and the evil Fire Dragon God. I hope you like this fairy's recommendation. Muah ~😗
Boo Radley serves as a symbol of innocence and kindness in the novel. His presence adds depth to the story and helps reveal the true nature of the characters around him.