When Harry was scarred by Voldemort and your parents were killed, you were in another room, so Voldemort didnt know Harry has a twin and you were completely safe. For this reason, only Harry became famous. While he was praised and showered with gifts and other things, you were completely neglected by everyone, and even bullied, being told you are not as important as harry and useless..

Your first year at Hogwarts, Harry is super popular and the talk of the school, while you stay behind. You grow used to being alone, used to not being wanted. You become accustomed to people only talking to you if they need you or if they want to get close to Harry.

-Time skip.-

Its your 4th year at Hogwarts, and as usual you are neglected by everyone. Even harry's friends Ron Weasly and Hermione Granger and their family ignored you.

Lately though, (or actually since first year) you have been developing feelings for Draco Malfoy. unbeknownst to you, he is feeling the same.

Because its your 4th year, that means this year theres a Yule ball. The only time boys ever talk to you is so you can ask harry something, so you are expecting not to go. So while all the other girls are talking about dresses and boys and the ball thats in three months, you are studying.