急求!The most unforgettable person in my life 的英语作文语法错尽量少,这可是要比赛的!

When I was in high school,one of my classmates sit right beside me.His name is ChenLiang.He is my unforgettable person in my life.
I remembered my mathematics was just mediocre at that time,but he was extraordinary and excellent in calculating and solving mathematic questions.He often received perfect scores.Of course,I wished I could reach at his level.Since we talked all day long,I asked how he could solve those difficult questions.He was so patient and polite to answer my sometimes ridiculous thinking.Gradually,I built my confidence at mathematics and finally passed the college entrance exam.
Now,we are apart,but I still remember his great attitude and willing in study.I am so obliged to my classmate,who is my friend always and forever.