Why did she friend zone me?

there is this girl that works at this coffee shop i go to every once in a while she started talking to me today, she asked me if i had a hangover and then she started asking me questions about my shoes, i wasn't really in the mood to talk at all but she kept talking to me when i was waiting for my drink, she showed me this pair of sunglasses i guess they had and she asked if i wanted them, i said no but she insisted, then she says "you remind me of my brother, he's tall and kind of chill like you" in my mind I'm thinking, if your going to friend zone me, why would you keep going out of your way to talk to me etc. The funny thing is I wasn't even into this girl but it did annoy my how she friend zoned me, why did she do this?
Why did she friend zone me?
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