I need help finding this movie T.T

I'm pretty sure it was an older movie somewhere in the 2000s. I'm not quite sure though. I remember the plot being about a girl who went on a trip to do this book roleplay thing about the royal family thing, and then she has a fling with the farmer while she'a there but it was all a bet. She got upset and left, went back home but the "prince" actually liked her and went all the way to find her and they lived happily ever after or whatever. PLEASE HELP ME! I remember I quite enjoyed the movie and I want to watch it again. Thx :)