1是没有碰到好老师,2是没有掌握合理的方法,第三嘛,你没有找到学习的动机.So what you have to do is , first off, pay some money to someone who is capable of teaching English. Second, ask him for the suitble learning method for English. Third, think about why you haave to learn English, for instance, in order to make more money, or go to study abroad, ect.
Believe yourself. English is more and more important in this day and age. Do your best.