Harry can focus on self - improvement. He can pour his energy into his studies, become an expert in different branches of magic. This would not only boost his confidence but also make him more independent. For instance, if he masters advanced potions making, he'll feel a sense of accomplishment on his own.
He would probably try to figure out what went wrong. Harry is a curious and determined character. He might start to recall recent events to see if there were any signs of his friends' discontent. He could also try to reach out to them, either directly or through mutual acquaintances, to ask for an explanation.
He might turn to his studies more intensively. Since he has no friends to distract him, he could pour all his energy into learning new spells and magic, becoming more powerful in the process.
One possible plotline could be Harry feeling extremely depressed at first. He might isolate himself even more, spending long hours in the library or wandering the Forbidden Forest alone. Another plotline could involve him finding new, unexpected allies who help him grow stronger and more independent. For example, he could befriend some of the house - elves who have their own unique magic and knowledge.
One possible reason could be jealousy. Maybe Harry has achieved something great and his friends can't handle his success. For example, if he gets a very important role in a magical competition, his friends might feel overshadowed. Another reason could be a misunderstanding. Harry might be wrongly accused of something, like being in league with the dark side, and his friends, in their fear or haste, abandon him without giving him a chance to explain.
One possible storyline could be that Harry discovers his friends have been influenced by dark magic or a powerful spell that makes them shun him. He then has to find a way to break the spell while also dealing with his own feelings of betrayal and isolation.
In the fanfiction, Sakura could initially go into a state of denial. She may keep reaching out to her friends, trying to re - establish the connection. However, as time passes and she realizes it's futile, she might gradually become more independent. She could start making new friends who truly appreciate her, which helps her heal from the pain of being abandoned by her old friends.
He might become very self - reliant. Since he has no one to depend on, he learns to take care of himself in every aspect, like finding his own place to live and getting food. He could also start to study magic more independently, exploring areas that were previously forbidden or not well - known.
In some fanfictions, Naruto might become more withdrawn at first. He could focus on self - improvement, training harder to prove himself. He might also start to question his self - worth since his friends' abandonment makes him feel unwanted.
Jaune might focus on self - improvement. He could train, study, and become stronger. By doing so, he would show his former friends that he doesn't need them to be great. He could also explore new parts of the RWBY world and meet new people who appreciate him for who he is.
In such fanfictions, Harry might overcome the emotional trauma by finding true friends. These friends could provide the love and support his family didn't. For example, he could meet someone like Hermione who is intelligent and empathetic. She could help him study and also be there for him emotionally. Another way is through self - discovery. Harry could realize his own worth outside of his family's view of him. He might discover he has unique magical abilities that make him special and valued in the wizarding world.