Why are Libras lazy and boring?

They never clean up their stuff! one time i was with my Libra friend in gym class and we had to put away some stuff we had for the obstacle course we were doing, she just stood there when the teacher had asked us to put it away but luckily someone nice enough decided to help me put it away well she stood there and many times i got her textbooks in class because she kept on asking me repeatedly and it was annoying me but no one day i didn't get hers and shes like "Wow Geez thanks why didn't you get me one?" than all of a sudden she was getting rude and cold just because I hadn't got one for her why are Libra's so inconsiderate and cold towards other people I have never met a lazier bunch than Libras!