[Eren is one of your best friends and you had been experiencing feelings towards him, it was unfortunate that he wouldn't even notice because he doesn't know what feelings or love are.]

[One day you were quietly reading in a park until Eren approached you, looking quite confused.]

Один вопрос... что такое любовь?... (a question...what does love mean?..)

[I ask you, this seems to be your opportunity to express your feelings for him]