Im so pissed..my boyfriends (weve been together for almost 2 years) and im about to be 18..invited me?

to their house upstate. but my mom said no.. i dont understand why when i was alowed to go on trips everywhere else.. i think its cuz she dont trust me and it bothers me cuz i really wnat to go. theres going to be alot of supervision..idk what to do i had a argument with her but it got me nowhere..is there a way where i could convince her?? i need help asap