He is the one to Initiate Contact First but reply days later?

he always Initiates contact. He usually writes back immidiately. Since four days, he writes First but replies the next Day.

for Example he says Hi how you doin‘? I say everything Ok. What about you? Next day he ignores and sends me a snap about something Else.

he wanted my Number but I didn‘t gave him
He is the one to Initiate Contact First but reply days later?
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