Why won't he message me?

I work in retail and this guy comes into my store often. I've liked him for a while now and I could never tell if he was interested. He doesn't ever really say much. I got tinder like a week ago and I swiped right on him and we matched. He never messaged me. I didn't want to message him first because I was nervous. But after 6 days I decided to message him. I thought that maybe he was nervous or something. So now its been over 24 hours and he still hasn't responded. Does anyone have any ideas of why he wouldn't message me? I assume that he was interested in me because he swiped right. Am I mistaken?
Why won't he message me?
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