Was this girl interested or I was just completely wrong about signals?

I am a shy guy and today I decided to asked a shy girl at work straight out if she had feelings for me. She said no. I noticed that her eyes where glowing and cheeks were red with a smile in her face. I will take her words for it and act normal when I see her but I was 100 percent sured that she liked me before the rejection as before I decided to asked her she showed signs such as staring me for a long time, locking eyes, always looking back in my direction, hiding her face, pretending to be on the phone, being clumsy and having a soft voice that you could barely hear. I was surprise about her answer but in someway I feel relief that I did asked her and respect her choice.
Was this girl interested or I was just completely wrong about signals?
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