Seoul - Manchester United's South Korean midfielder Park Ji-Sung has expressed his desire to stay on at the English Premier League giants despite an uncertain future at Old Trafford."It's true that I said I want to retire at United," the 31-year-old told reporters on his arrival in South Korea on Thursday."But what I want does not always translate to reality. It becomes more feasible when the whole situation clicks."Park finished the season with United, Premier League runners-up to rivals Manchester City, without a medal for the first time since he joined the club in 2005.He appeared in 17 league matches and scored just twice, sparking speculation that he could leave.Park, entering the final year of his contract, admitted he had a disappointing season."But I want to forget the past and think about what I have to do in the future," he said. "I do not have time to think about next season. I need to rest mentally and physically."