Why does Gatsby lose Daisy during the confrontation at the Plaza?Could he have done anything to win her, do you thik? If he could have, why doesn't...

Essentially, in The Great Gatsby, Gatsby loses Daisy because he is trying to recapture something that never existed in the first place.  He can't recreate the relationship because it never existed in actuality as it does in Gatsby's mind.  In short, Daisy never loved Gatsby like Gatsby loves Daisy. 

Daisy won't announce to those present that she nover loved Tom.  She tells Gatsby that he asks too much.  It's not enough that she loved Gatsby once, or even that she loves him now.  Gatsby has to have the whole illusion, and Daisy won't give it to him.  Gatsby is doomed, period.  Nothing he says could make any difference.  He can't recapture what never existed.