u should say it to her if its not too late, or do something nice if it means that much to her. u just gotta admit u were wrong and face it
i once forgot to wish my mom a happy birthday, then when i tried calling her later that day she wasnt home so i left a message. then she sent me this broken hearted message on my phone about how she means nothing to me. i was pissed that she got so dramatic when i did call but she wasnt home but i had to call her back anyway, what else can u do?