Sakura could become very angry. She has been let down by those she trusted, and anger is a natural response. She might lash out at her friends or distance herself from them immediately. For example, she could say some harsh words to them in the heat of the moment.
She may also feel a sense of deep sadness and loneliness. After all, friends are an important part of one's life. In the 'sakura is betrayed by her friends fanfic', Sakura might start to question her own judgment in trusting them. She could withdraw into herself, spending more time alone, and might even start to have self - doubt, thinking that there must be something wrong with her for her friends to betray her.
It's also possible that her adventure - team friends betray her. In a fictional world, if there are some high - stakes situations like a quest for a powerful artifact, they could betray her for their own gain, such as getting the artifact all for themselves.
In a fanfic, the betrayal might also be a misunderstanding. Her friends could be misled by false information about Sakura. For example, an enemy might spread rumors that Sakura is planning to betray them first, causing her friends to turn against her without really knowing the truth.
Well, Sakura could also try to understand why her friends betrayed her. She might be the kind of character who looks for the root cause of the problem. She could approach her friends, not to forgive them right away, but to have a conversation. By doing this, she hopes to find out if there was some misunderstanding or if they were forced into betraying her.
Sakura could seek revenge. She might use her own skills and knowledge to expose her friends' betrayal and make them pay for what they've done. This could involve outsmarting them in various challenges or battles within the fanfic's plot.
The other members of their team or the village might have mixed reactions. Some might side with Sakura, understanding her point of view, while others might think she's being hasty or that they should try to preserve the relationship for the sake of the village's stability or their own friendship circle.
Sasuke might initially be a bit aloof but secretly be happy for them. He's always had a complex relationship with Naruto and Sakura, and deep down, he would see that they are good for each other.
Kakashi would be more of a supportive figure. He has seen Naruto and Sakura grow up, and he would likely be happy for them. He might offer some advice to Naruto on how to handle this new relationship, especially considering the challenges they might face as ninjas. For Sakura, he could give her words of encouragement to be true to her feelings.
At first, Naruto might be in shock. He has always trusted his friends, so the sudden betrayal would be a huge blow. He could be silent, unable to process what has just happened.
Naruto could also feel a deep sense of hurt. After all, he has been through a lot with Sakura. In the face of her betrayal, he might start to question his own judgment of people. However, being Naruto, he would not give up easily. He might try to find a way to redeem Sakura or at least make her see the error of her ways. He would draw on his own experiences of being ostracized in the past and use that to try to understand her actions and find a solution.
Allow yourself to feel the pain at first. It's natural. But don't let it consume you. Try to forgive the person, not for their sake but for your own peace of mind. However, forgiveness doesn't mean you have to be friends with them again. Look at the situation as a learning experience. In those 'betrayed by friends stories', the people who were betrayed can use this to become more cautious in future friendships. They can learn to set boundaries better and not be so trusting right away.