Why would he reach out and then not reply? Why is he playing games?

So I had a casual thing with a guy. He then ignored me for a month. But the other day he messaged me asking if I was available. I didn’t reply as I was sleeping and the next day I replied and said why I didn’t reply. Then today I messaged him to let him know I’m still available and to let me know when he is free. No response. Why is he playing this game?

Why would he reach out and then not reply? Why is he playing games?
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