Harry could initially feel intense anger towards his parents. He might go on a quest to find out the truth, and during this process, his anger could turn into a determination to prove his parents wrong or to find out what really forced them to betray him. Along the way, he could also become more cynical and less trusting of others in the wizarding world.
He would probably be very confused and heartbroken at first. He might isolate himself from others as he tries to make sense of what has happened.
At the start, Harry would likely be in a state of shock. His whole world view has been shattered. He might start to act out, getting into trouble at Hogwarts. But as time goes on, he could start to dig deeper into the mystery. He might meet some new allies who help him see that there could be more to the story than just simple betrayal. His reaction would be a complex mix of emotions that would change and evolve as he uncovers more about what really happened.
At the start, Harry would be stunned. His whole life has been built on the idea of his parents being heroes. When he realizes they betrayed him, he would be heartbroken. He might go on a journey to find out the real motives behind their actions. Along the way, he could become bitter and vengeful. However, he might also find some inner strength and decide to rise above the betrayal. He could use it as a motivation to break free from the shadows of his parents and create his own path, but not without a great deal of emotional turmoil first.
At first, Harry would be in disbelief. He would think it was some sort of joke or misunderstanding. But as the reality sets in, he would become a bit of a loner. He'd still have his sense of right and wrong, so he might continue to fight against the dark forces on his own, all the while hoping that his friends would come to their senses and realize they made a huge mistake in betraying him.
Harry would probably be overjoyed at first. After all, he has always longed for his parents. He might start to look for ways to make it happen, like searching for magic spells or ancient artifacts that could bring his parents back.
Harry would probably be heartbroken. He trusts Ginny deeply, so her betrayal would be a huge shock. He might initially be in denial, not wanting to believe that Ginny could do such a thing.
At first, Harry might be confused. He would try to figure out what went wrong. He might search his memory for any signs that could have led to this betrayal. Then, he would likely experience a range of emotions from sadness to rage. Depending on the nature of the betrayal, he could either try to win them back by showing them the truth or decide that they are no longer worthy of his friendship and focus on his own path, maybe even leaving the wizarding world for a while to clear his head.
He might be extremely angry and confused. After all, parents are supposed to be the ones you can trust the most. He could start to question everything he knew about his family and himself.
Harry would probably be deeply hurt. He has always considered Gryffindor his home in Hogwarts, so such a betrayal would be a huge blow to him. He might initially be in disbelief and try to find out the truth.
However, in other fanfictions, Harry tries to understand the situation. He might be heartbroken, but he still has that innate goodness in him. He starts to investigate the reasons behind the betrayal, reaching out to old friends or making new allies. He hopes to find a way to resolve the situation and perhaps even forgive his parents if possible. This shows his growth and maturity as a character, even in the face of such a difficult situation.
Harry would likely be deeply hurt. He has been through so much already, and this betrayal would be like another stab in the back. He might initially go into a state of shock, not believing that someone he loved could do this to him. Then, he would probably become very angry. His trust would be shattered, and he might lash out, not just at her, but also at those around him who he feels might have known or been involved in some way.
Harry may also get angry. He could lash out at the person who he believes has betrayed him. For instance, if it was Ron, he might shout at him and say things he doesn't really mean in the heat of the moment. This anger would be a result of his deep - seated hurt from the betrayal.