Well, why doesn't she go to do her stage abroad while you remain in Korea? I mean, 6 months is long but not that much either, personally I know some people who've been split apart for longer than that due to work or travel (my parents at the time have been split 6 months too when my Dad went to do his trademarket course in Toronto). I think it would be the easiest way and it's quite doable if you ask me, plus a 6 months is just enough for both of you to miss each other and to be extremely happy once you'll find back each others. Could it be a possibility?