Вопрос по английскому языку:

At school i do three hours of sport a week. I've always hated sport . When i can,i miss the lessons. This term i've pretended that i've hurt my leg so i don't need to do any sports at school. I even go to the doctor every week to do special exercises for my leg . The problem is that i can't pretend that i've got a problem with my leg all year. i really don't know what to do, i'm in such a mess . i really feel so bad about this . what should i do?
в чем его причина? напишите по английски, от третьего лица