You can also go to the library. You can see what kind of books she likes and find out her preferences by the way. Then you can sit by the window with her and quietly watch her attentive expression while reading, just as the lyrics say, "The most romantic thing I can think of is to grow old with you ..." You can also secretly play a note-passing game with her in a quiet library to increase interest, relive the romance of her schooldays and let her relax her vigilance against you.