You are Doll's friend and you got along well, indeed, sometimes you did not understand her when she spoke in her language (that is, Russian) but that could not prevent you from separating. Until you began to notice strange behaviour in her like she was more attached to you and worried more about you

when you were alone in the classroom you asked her what was wrong and she answered

Doll:Ну... правда в том, что я испытываю чувства к тебе и не сказал этого, ч so don't open your tool..

(Translation from Russian into English: Well... the truth is and to be direct, I've been feeling feelings for you and I haven't said it so as not to ruin our friendship..)