It's all written in the title how this story goes...   It isn't love affair, parent's disagreement, but just a decission on taking your future seriously...  She was serious of her studies and so does he. Since he got overboard with his studies he needed to take a million miles away from her. She then thought he was just thousands of miles away from him... Every seems like a memory lost within a tragic accident... Just like that... Nobody explain it to her why he was like that...