On the other hand, Ginny could be very understanding. She might realize that Harry has his own reasons, even if she doesn't know what they are. She could decide to give him space and time, hoping that one day he will change his mind. She may focus on her own life in the meantime, like her Quidditch career or her friendships.
Ginny could also be angry. She might feel that she has been led on by Harry or that he has misjudged their relationship. She could lash out at him, shouting and telling him how much he has hurt her, and might even try to hex him in her rage.
She might be heartbroken. Ginny could initially be in shock and disbelief. She may retreat into herself, spending a lot of time alone in her room, crying and trying to understand why Harry would refuse.
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.
One possible reason could be that Harry might feel he's not ready for marriage. He has been through so much trauma from fighting Voldemort and might need more time to focus on himself and his own healing. Another reason could be that he might view Ginny more as a sister or a close friend at this point in the fanfiction, rather than a romantic partner.
One possible reason could be that Harry is still haunted by his past traumas and feels he's not in the right mental state to marry anyone. His experiences with Voldemort and the losses he's endured might make him reluctant to bring Ginny into a potentially unstable future.
Maybe Harry has some unresolved issues from his past, like the trauma of losing his parents and many of his friends during the fight against Voldemort. These could make him hesitant to enter into a marriage with Ginny. He might also be worried about how the wizarding world would view their marriage, especially if there are still some who oppose him or his family.
She might be hurt at first. Since she's pregnant, her emotions could be more fragile, and Harry's anger could really sting.
Ginny would most likely be extremely happy. She has deep feelings for Harry, so his proposal would be a dream come true for her.
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.
It could be Draco. In some fan fictions, they have a complex relationship that could develop into a romantic interest. Draco's character has a certain allure and his past enmity with Harry could transform into a deep, passionate love in the context of a gay fan fiction.
Alternatively, Ginny could be very mature about it. She might respect Harry's decision, even though it hurts. She could choose to step back and give Harry the space he seems to need while secretly hoping that he will change his mind in the future.