A girl at work told me that "I am a catch" and another day said "you're cute" but she doesn't show interest?

I never understood her. why would a girl call me these things but never wanting to actually see if we would be good for each other. I'm not saying that we would be, as I do not see her anymore. but why would a girl say things like this and not want you?
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+1 y
I forgot to mention in the question that she already had a boyfriend and she knew him from way back in school like 2nd grade kind of thing. so I think they knew each other anyway. and its not like I would try to take her away from her boyfriend anyways.
A girl at work told me that "I am a catch" and another day said "you're cute" but she doesn't show interest?
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