...sounds like its going to be pretty awkward now @_@;
Er, i really don't know what else to say. Um, i dunno much(IE NOTHING~) but try to let her know eventually i guess? I mean, saying it right after this wouldn't be the best idea i think. Or maybe tell her that you said that out of surprise, but aren't willing to reveal who it is yet or something.
This is prolly horrible horrible advice >> So think about it before doing it