vacation with boyfriend

my boyfriend and his family are going on vacation soon and his mom invited me to come with. i’m 20 still living with my mom (currently saving up to move out) and i know if i ask her she’s gonna flip out. she already has a problem with me staying out late and whatnot but i really wanna go :/ and we’ve been having trouble in our relationship recently bc she’s starting to sense that i’m planning on moving out and she doesn’t want me to so she’s being extra “strict” with me. i’m pretty sure if i go without her consent she’s gonna flip out but i dont wanna care!!! what do i do :( i wanna try to convince her to go but if she says no idk i’m still gonna wanna go.