Let me just be. (날 좀 그냥 내버려둬 )
(=Let me be, Leave me alone, Don't bother me, Don't worry about me, Don't be concerned with me.)
A: You sure you don't want to come out with us?
B: No, I'm fine. I'm not much of a drinker.
A: It'll be lots of fun.
B: No thanks.
A: You sure?
B: Yeah.
A: Come on! Everyone'll be there!
B: Let me just be, okay?!