The guy I’ve been talking to for a week, has started taking forever to reply. How do I address that it’s bothering me, without seeming “needy”?

He initiates the convo, and then when I reply he takes up to 6 hours to text back.
The guy I’ve been talking to for a week, has started taking forever to reply. How do I address that it’s bothering me, without seeming “needy”?
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