What does it mean when a guy says he doesn't feel a spark after the second date but he does think it's very nice and can only talk to you like that?

He isn't sure about what to do. He doesn't feel anything, but he does think it's really really fun and he appreciates the talks we have and think they're special. He would be open to a third date. Is it worth a shot?
What does it mean when a guy says he doesn't feel a spark after the second date but he does think it's very nice and can only talk to you like that?
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