Why would a guy show a lot of interest then takes 5-10 days to respond. Why not just ghost me?

I’ve initiated hanging out twice he seemed interested both times but never followed through we had inside jokes he opened up to me he would approach me first say hey when I seen him in person I thought we where going good but after he taken 10 days to reply but he’s online all the time. I figured I won’t even bother talking to him.

Why would a guy show a lot of interest then takes 5-10 days to respond. Why not just ghost me?
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