Growing up

I am 18, I just graduated from high school and at first my mom gave me a crewfew of 12:00 while in school, so now that I am out I don't have a crewfew, but my mom has this thing where I have to ask if I can go somewhere, if I can stay at a friends house, and I feel she is still treating me like a kid how do I tell her I am not a kid anymore 😁