Can't remember what is was but I'm sure it went like two girls where one doesn't talk and the other claims they are in a relationship and can understand her without speaking but gets a new expression that day and doesn't understand. their interactions turn sour and the one who doesn't talk thought she got a rejected because she tried to "invite" her up to her room.

edit
i think it started out by her telling her classmates that they ars going out and they go home together but the silent ne doesnt say anything cause she can tell what she is thinking and then while they are talking she was leaving and the classmates commentd that she is just being a stalker.

....just found it From Your L-I-P-S