What does it mean if my coworker responded to my instagram story?

Anonymous
There is this guy at work but I'm unsure if he likes me. When I flirt with him he flirts back and sometimes he even teases me for example he made fun of my last name. I added him on instagram and posted an instagram story and he commented on it, but when I tried to continue the conversation he only replied with emojis, so I am a little unsure. Would a guy comment on a girl's instagram story if he didn't like her? When I posted that story I was in another city, I'm going back to work in about 3 weeks.
What does it mean if my coworker responded to my instagram story?
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