mum won't let me see boyfriend 😞HELP

Lily
So today is me and my boyfriends 1 year Anniversary and my mum doesn't want me seeing him because I've been with him so much lately. This is such a special day for us and all we wanted to do is chill at home and then go out for dinner but she doesn't want me seeing him at all. What should I say or do? I can't not see him today, please help!