Calmly tell him that your parents are paying for the apartment, and that they had conditions that you had to meet. Given that it isn't your money or his, you met those conditions. Tell him that you are not being selfish by choosing a living situation that is best for you, you are having healthy self-preservation. Perhaps you could offer to pay for a portion of extra fees he incurs by driving to you and extra 8.0 kilometers per trip?