If you want to close the distance, talk to her more, meet her more, and learn about her interests, hobbies, likes, and so on. As long as you put your heart into it, you will find out, and then start from this aspect and talk more about her favorite topics. After talking for a long time, she will think that you are very speculative with her, and will gradually have a good impression on you, and then you will succeed. As for confession, it's not really possible. After you get to know each other, she will think you are successful. In fact, if he has a good impression on you and likes you, no matter what your confession is, romantic or old-fashioned, she will like it as long as you say it.