Does she regert rejecting me?

Hello guys, around 7 months ago I asked this girl out from my workplace, she is very shy, polite, and kind. She said I will check my schdule obviously she never did and then I knew it was a polite rejection. I moved on and lately she is back to look at me when we walk past one another. Everytime we walk by each other she gives me the look and smiles, and my workmates even caught her checking me out twice. why does she do it? does she like me back and regreting? is she friendly? or is it just in my head? also important to mention that this girl always laughs from my silly jokes while walking past me in the hallway.

Does she regert rejecting me?
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