I agree with all the previous posts about maturity, separation and the teen brain. When I read your post I also thought that as an introvert I'd be uneasy with visitors. Even if I like the people visiting, it takes away some of the total relaxation I feel when I walk into my home (refuge) after a day in the workforce. Combine that with student / college stress, and not being skilled at filtering emotions and you get this situation.
I wouldn't take it as a moral issue about your rights, gratitude etc. ; thoughtless, grumpy, entitled yes, but we all have weak moments.
Maybe if you'd reflected her feelings back 'you're annoyed about xxx' she might have just talked herself out of it. Easier said than done
