fantastic, 21 it is! hmmm, i'm trying to think of how realistically they could maintain a relationship. likely no more than 6 months, so somewhere between 4-6 months? and that would make sense - she got fed up with him going out with the frat bros to party, and she got hyper focused on her studies so that she could finish strong with top grades, so their lifestyles tended to clash. she'll use all the adorable british slang on him too, it'll be grand. :D