How good first date has to be to get second?

My friend was on a first date two weeks ago. He was with a girl who was crushing on him for so long and kind of chase him. I honestly thought they are already together cuz it looked like that. Things were looking well for him. But after a date she turned him down. He does not know why. He said she was a bit weird already a weekend before they went out. He said she was a bit distant. But it really surprised me she let him go cuz she was crazy about him. I recently asked a girl out and she said. This thing with my friend makes me kinda nervous about my date. What do you think?

How good first date has to be to get second?
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