So does this confirm that Blair waldorf is richer than Nate Archibald?

Well the Archibalds lost all their wealth, so yes. But originally they were more wealthy than the Waldorfs. Think about it. The Archibalds are linked back to the Vanderbilts. And when Nate is dating the Countess, and Blair is dating Marcus, the Countess says that she'd never be happy with Marcus dating a lowly Waldorf, but she was perfectly fine with hooking up with Nate. So currently, because the Archibalds lost their wealth, the Waldorfs are richer, but based on background, the Archibalds are more wealthy.