He knows he loves you but he won't show it. He is too busy with his own reality. He is too busy with his work and career. He seems like he won't spent his time with you even for a hour. But deep in his heart, he is really care for you. He just too bad to express his feelings. Also, he is a very good liar and manipulative person. He won't ever let you go. He never dares to hurt you but he doesn't realize that he hurts your feeling. So he is just cold towards you and ignores you sometimes.