Why does he text me first then never reply after I text back?

Anonymous
We had a job orientation and a guy who I work with texted me. We were having lunch in the cafeteria and when he saw me he says "Oh hey there's Michelle" so I said hey. He then texts me saying "Hey", I respond by saying "What's up" and he never replied back. Why did he do that? Why would guys text first then never reply after you text them back?
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Is this a bad sign then?
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Why does he text me first then never reply after I text back?
7 Opinion