Dear Lihua,
I am sorry to heard that you feel depressed and stressful in your study.I believe this phenomenon is common ocurrance.I am sure you will enjioy it when you succeeded in achieving higher score in your study.Believe in yourself and never give up! You will find everyting you have experienced have become beautiful memory of yuor life.Of course,when your get in trouble,you may share your sorrow with your best friends,it's certain that he will help you out.
Besides,you should do some excercise to build your body,that is another way to let out your pressure.I wish you have a full life!
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