I'm just making an assumption here, but everyone knows about her because you told them? right?
Well, thats normal if you told them a few quick details about your date. Most likely she felt overwhelmed because she was expecting that no one would know her there. Nothing to be upset about. Don't overthink on what happened. If she asks why everyone knew, just tell her the truth. Its not that hard. If she starts acting all "odd" about it, try to explain it to her in a calmly fashion.
Take her out again and see how it goes.
Evil School!!
May not be on LF as much, due to unforeseen circumstances.
Blame College and Homework for Everything!!
-Fawn