Judging from your's chat, you are already very good friends, but it is not clear from here whether she is interested in you, but she still cares about you, just limited to friends. Since graduation is coming soon, you'd better ask her to watch a movie or something, and then ask her clearly. Of course, you can also chase after graduation, but I still suggest chasing after graduation. After all, as a teacher, I am a little uncomfortable with the love between teachers and students in school. Come on, don't have any regrets.