Annoyed

I’m nearly 18 and my mum wont let me go out on the weekend because “I’ve been going out too much” which is a ridiculous reason and I don’t understand wtf is wrong with her for using that as an excuse. Like what am I supposed to do, stay in and do nothing and be bored all day ffs. Im so angry because she’s just being stubborn and unreasonable and I was wondering what I can do or say for her to let me go?