The girl said I didn't know her. I said let me know. The girl replied, get to know it slowly. What do you mean, no?

How can it be a refusal? Others say that you can get to know her slowly, which means that you can get to know her slowly in the future. In fact, the implication is to give you a chance to behave well, and see what people like through future contacts, including what they like to eat and what they like, and then her personality. That's all you have to say. More contact and understanding can lead to marriage. To see if two people have the same topic and different values, we need to study it slowly. Take your time, don't worry!