Making someone like you who has previously rejected you can be difficult and there is no guaranteed way to do it. However, there are some things you can try to increase the chances of changing their mind:
It's important to remember that people's feelings can change over time, but it's also important to be realistic about the situation and understand that there is no guarantee that the person will come to like you. If that happens, it's best to move on and focus on finding someone who will appreciate and reciprocate your feelings.
First, it is important to respect her decision and give her space. Don't try to pressure her into changing her mind. Instead, focus on being patient and showing her that you are a kind, thoughtful, and respectful person. Show your interest in her and try to get to know her better. If she sees that you are worth her time, she may start to change her opinion of you.