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.
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.
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.
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.
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.
Yes, it is possible in the realm of fanfiction. Fanfiction allows for creative and often out - of - the - box interpretations. Writers can create scenarios where Harry Potter befriends the Basilisk. Maybe through some magic that tames the Basilisk or a special bond that forms due to shared experiences. It goes against the traditional narrative of the series but that's the beauty of fanfiction, it can rewrite and reimagine the story in many ways.
It could be that he is wrongly perceived as dangerous. After all, he has survived the Killing Curse as a baby and Voldemort is always after him. People might be afraid to get close to him for fear of getting caught up in the dark wizard's wrath.
One interesting aspect could be the unique plot ideas that were left unfinished. For example, some might have had really creative takes on the wizarding world's history or new magical creatures. Another aspect is the different character developments that were being explored. Maybe a fanfiction was showing a side of a character we don't see much in the original series. Also, the writing styles in these abandoned works can be fascinating as they often vary from very formal to extremely creative and unorthodox.
One way is to search on some old - school fanfiction websites. There are often archives where you can look for works that haven't been updated in a long time. Another option is to ask in Harry Potter fan communities. There are people there who might know of some abandoned works or have a collection themselves. You can also try searching for specific keywords like 'abandoned' along with 'Harry Potter fanfiction' on search engines, but this might be a bit hit - or - miss.