My sports

I play American football in club. I have played it for 4 years since I entered the Kwansei gakuin high school. I joined it because the Kwansei gakuin's American football team is very strong. It was 27 times top team of Japan! However, top team of Japan practiced harder than I was imaging. I wanted to leave the American football club many times in four years because I want to play like other university students, too. However, I don't leave the club. Why? What is a cause to attract me so much??