Yeah, I know the feeling. I, too, had a pleasant night with a couple of girls during a school trip. We were in one of those rooms in the hotel that are not used, like a section of a dining room. It was fun.
So fun, in fact, that one of them said "wait, this is more fun than whatever they're doing over there" and went to bring the other 6 people from class. Magic was destroyed just like that.
Not that there was ever anything romantic, then, before or later, but still. Shame.