Break up or keep it going?

My boyfriend and i have been together for about two years now but i will be moving to japan for two years cuz I'm in the military. We wont have no contact with eachother only by phone. Do u think i should break up with him? Or try to keep our relationship going? We have been arguing over little things more than usual but i think because we know the day is getting closer for me to depart. What should i do?