Wondering whats going on?

Little bit of context a girl I work with ( different companies but see each other daily almost ) so we went on a couple of dates but she decided she just wants to be freinds which is OK by me it was a couple of dates no big deal. Ever since then though she has been more attentive to my presence such as making sure she talks to me while she's at my store, added me on her snap, has even brought me lunch and refuses to let me pay her for it. Is she just being over friendly or is something else still there. She was not like this before the couple of dates.
Wondering whats going on?
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