How to know if a guys playing games with you through text?

So me and this guy had a thing I guess only online was friends took it sexual sent some nudes then back to being friendly with each other cause I found out he had a girlfriend. Well I noticed as of lately he leaves me on delivered after 10pm and stays that way for days unless I reach out to him and if I text him he responds fast to me each time. But what’s with it?
How to know if a guys playing games with you through text?
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