Get out of the house

I have a really really strict mum like I have to come back at 6pm. She doesn’t let me go to parties,she won’t drop me off to my friends all the time,she won’t let me take the bus ect. I want to see my boyfriend and he’s only a 10 minute walk,what’s an excuse for my mum to let me out because I can’t tell her I’m going there as she will never let me out the house again