Maybe their meeting was an accident. She thought they would never meet, but it trapped her year after year. She would give everything for him. She worked hard to change, just so that she could have the courage to say "Long time no see" when she reunited with him.
All her dreams since she was 11 years old have been related to him. She has always looked forward to their reunion, even if it was just for a brief moment. She really, really likes him. Even if he falls in love later, she will choose to wait for him. She always believes that there will be a response if she never forgets.
She would never let anyone replace him. She was afraid that he would look back and see someone beside her, so she kept rejecting all members of the opposite sex. Everyone thought she was a scumbag. She must have been in many relationships, but no one knew that she had been alone for only one person.
Purpose: He will always be her dream