About your problems, sometimes most of you still want parents' help and advice. However, talking to them can be difficult. What should you do to make it easier?
The more you do something, the easier it will be. Everything seems difficult at first. But if you talk to your parents more often, you will be surprised to see the change. And next time when you have problems, you will feel more comfortable to talk with them.
Tell your parents something about yourself. You can share your school life with them. Even a small talk like what's for dinner can keep the relation between you and your parents strong and comfortable.
Maybe you also need to tell them some bad news like failing an exam. Don't be worried about what they will think of you. On the contrary(相反), they will help you find out the reasons for your poor grades. And next time, you will do better.
Anyway, remember that you are the most important person to your parents in the world. If something they do upsets you, you shouldn't be angry with them. Just have a good talk, and I am sure everything will be better.