Well, in many fanfictions, Harry might use his gentle voice. He could hold Ginny close and whisper soothing words to her, like 'It's okay, Ginny. I'm here with you.'
In some fanfictions, Harry uses his magical abilities in a gentle way to calm Ginny. He might create a small, calming charm, like a soft, warm light that surrounds her. At the same time, he would be talking to her softly, reminding her of all the good times they've had and how strong she is. This combination of magic and emotional support can be very effective in calming Ginny down.
Ginny might also calm Harry down by reminiscing about their shared memories. She could bring up the good times they had at Hogwarts, like the time they won a Quidditch match together. By focusing on positive experiences, it can ease Harry's anxiety or stress.
In some fanfictions, Snape might use his deep knowledge of magic to create a calming spell or potion specifically for Harry. For example, he could brew a special tea with calming herbs that he forces Harry to drink, and as the warm liquid goes down Harry's throat, he starts to feel more at ease.
Ginny might initially be heartbroken. She could retreat into herself, feeling betrayed and confused. In some fanfictions, she may cut off all contact with Harry immediately.
Ginny might support Harry by simply being there for him. In the face of everyone else turning their backs, her presence can be a great comfort. For example, she could sit with him at meals when no one else will.
She might directly ask him about her suspicions. Just come out and say 'Harry, I think you're cheating on me. I've noticed you acting strange lately.'
The fall could be a turning point. If Ginny gets seriously injured, Harry might realize just how much she means to him. He could become more protective and committed to her. Ginny, seeing his concern, would feel more secure in their relationship. This event could be the catalyst for them to take their relationship to the next level, like getting more serious about their future together in the wizarding world.
Ginny could be heartbroken. She might initially be in denial, thinking that Harry will change his mind. She has loved Harry for a long time and expected a future together, so this refusal would be a huge blow to her emotions.
Ginny could be heartbroken. She might have expected to marry Harry after all they've been through together. She could initially go into a state of shock and disbelief, not understanding why Harry has refused.
In this fanfiction, Harry could comfort Ginny through his words. He might tell her that what happened in the Chamber was not her fault. He could share his own experiences of facing difficult situations and how he overcame them, making Ginny feel that she too can get through this tough time. For example, he could say something like 'I've been through a lot of scary things too, Ginny, and we've always come out stronger in the end.'
In fanfiction, anything can happen. However, if Ginny cheats on Harry, it would likely shatter the trust in their relationship. It could lead to a downward spiral in the story, with Harry feeling betrayed and perhaps seeking revenge or just distancing himself. This could also change the dynamic among their friends and family, as everyone would be caught in the middle of this drama.