Is the cashier flirting with me?

Two time per week, I'm going to a store for buying food. I have seen a very cute girl there many times before. She's working at the store. One time per week she's standing behind the till and taking my order.

Recently she have started to say hello to me first, even when she's not standing behind the till. She say hello with a big smile. I have never seen she doing that to other customers. This happened a couple times recently. Last time I saw her at the storefront. My idea was to say hello to her first, but I was too slow. So she said hello first with a big smile.

Does she likes me?

Sorry for my bad english.
Is the cashier flirting with me?
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