Why would she be rude?

I used to see this girl every day at the same time in my apartment hallway. We would exchange hellos. We must have had the same schedule because we crossed paths at the same time every day. After several weeks of this, I decided to tell her my name and I asked her for hers. She responded with "it's nothing." I felt no attraction to her and wasn't "hitting on her." I just thought it would be nice to call each other by name while exchanging greetings, Does her response seem weird/rude to you?

Why would she be rude?
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