Annoying teacher

The school term has started up recently and it is currently winter so before school each morning i often sit in the library. However my schools librarian always throws dirty looks at me. Im a pretty quiet and generally well behaved kid and I haven’t had many interactions with her so Im not sure why but on top of this rather recently she had said i was not allowed to be inside as i wasnt doing anything productive and said it with a really irrated tone. However i wasnt even in the library i was outside of it and even then all i was doing was a duolingo course and many of the other people also arent doing anything school work related. it will only get colder and i dont really want to sit outside but it always feels awkward for me whenever she throws me dirty looks and after that instance im not sure what to do as there is no where else to sit.