17 am I being a stupid teenager or am I right?

I am 17 years old and have had a steady 3 year relationship with my boyfriend. We had sex after two years. So that’s just back story, my boyfriends birthday is this coming Saturday my best friends is this Friday. Followed by our friends birthday on Monday. They all will turn 18. We thought of getting an Airbnb, it’d be 8 people couples and just friends for games movie night popcorn. My mom said I can not go she doesn’t think I should sleep with my boyfriend. She thinks we shouldn’t spend the night with eachother referring yo all the friends together. She found out we had sec and got very mad she found out I smoked before and was mad as well. I have never felt like I could tell her anything and I tried to be honest and tell her the upcoming idea. Any parents have opinions ? Thanks :)