My best friend really wants to be a doctor. She recently discovered that a writer (not very well known) who is a medical student wrote a book, and she read it. The writer will be signing autographs somewhere far from where I live. She asked me to go with my sister, since she is not in the country at the moment. The problem is that I didn't want to waste an entire afternoon just for a simple autograph, which, to me, has no meaning. I told my sister that I didn't want to go, and she told my friend. Now my friend is upset and even being a little stupid with me. She said she always does things for me, but the truth is that I never asked her to sacrifice herself or do things like “go to a certain place, take a simple photo, and come back home” for me. I understand that it's special to her, but to me it didn't make sense to spend so much time on it. Even so, she seems to think I'm a bad friend for not doing this “favor.” Am I wrong to refuse, or is she overreacting?