Dubai: In September, South African national Tiaan du Preez had to do one of the hardest things he has ever done: he said goodbye to his fiancée, Mishka, and took a flight to Dubai to begin a new career.The 28-year-old forward deployment engineer had a new job waiting for him in the emirate, and he was ready to begin his Dubai-it chapter, but Mishka had just landed a dream role at an investment bank in Johannesburg, so it wasn’t the right time fo…