How do you know if your work crush likes you?

We had a few conversations and he always smiles or laughs in the convos. He used to stare at me a lot before we moved closer together. Today, he asked me follow up questions about a conversation we had previously. Should I try talking to him more or is he just a naturally friendly person. He does talk to my other work employees and follows them on social media, so I’m not so sure if this is anything more than being friendly.

How do you know if your work crush likes you?
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