请英语高手帮我改改我的作文!我的有些句子写的不够通顺或者句子结构不好麻烦也一起改改!

请英语高手帮我改改我的作文!我的有些句子写的不够通顺或者句子结构不好麻烦也一起改改!
MY CLASSMATE
She,a girl of a small build,the teacher always biased toward ,was my classmate when I was a child.
In teacher’s eyes,she had many merits,for example,studying hard for achieving her aimes,being biunt with teachers,and being civil to stranger.But what about me,being always laying the blame on others when I made mistakes,also being blamed for lazy and many other disadvantages.The bias which teacher against made me shoulder so many heavy burdens that bring about the falling in my score and the losting with the self-confidence.
However this trend didn’t continue when I received a tip from her,my classmate,on which said :”cheer on!I believe you!“ at the same time,she racked her brain to cheer me up and encourage me.Enventually with her acid,I had being believed in myself and finally the examination brought out the best in me.Looked the ideal score,I bursted into tears.
Al though long time has passed ,I don’t forget the days of brilliant sunshine when I studyed together with her .but for her helpless ,I couldn’t reach my achievement.