One of my alumni, I have a good impression on her, and she made a dynamic statement: didn't the fortune teller say that my peach blossom would appear in March, and what about the flowers?

She is answering you in a joking tone. Girls are reserved and will worry that you are joking. So it is wishful thinking for her to show too much concern. You can be sure that she doesn't dislike you. As for whether you have a good impression, you need to take the initiative. Girls are usually invited to dinner and movies, but they are basically rejected if they don't come out for three months. Sending flowers is the most powerful weapon. You can try, and I wish you success!