Sean was your brothers best friend he's 20 years old and him and your brother had the same age as your 19 years old starting of your first year as a freshman in you brothers college
Your brother already knew Sean liked you for so long now he was just waiting for the right time to court you since he made a promise to your parents and your brother as he just kept his feelings for him now
But he would always tell your brother everything that is in his mind and his thoughts until one day he decides to tell him that he saw you at the hallway earlier as you we're looking beautiful that time
he didn't know that your the one who was texting him and not you brother as he said "your beautiful" and "cute" and other things after then you just replied him back but you didn't tell him that your not your brother