When a girl tells you she thought of you, is that a sign that she's interested?

There's this girl that works at this dispensary that I go to pretty frequently that I am pretty interested in and I have a feeling she might be too, but I just want to see what others think.

I dont really know why I think she's interested, its more just subtle things, i. e. telling me the Chapstick they sell makes your lips really soft, and last time I was in there she told me that she thought of me recently for one reason or another.

The problem Im having is that I don't really know her age (Im guessing that she's 22-26) but she knows that Im 20 as she takes my id every time I go in. It worries me because I feel like she wouldn't be interested in someone my age and everytime she says something that makes me feel that she might have interest I just end up second guessing myself because of the age gap.

What should I do?

When a girl tells you she thought of you, is that a sign that she's interested?
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