You don't have to feel terrible all the time on school days. Your school days can be some of your happiest time! Yes, it is possible. Let me tell you what you should do.

On every weekend, take a piece of paper and write down the title "My Schedule(计划)". Under it, you write the days of the week. Next to the days you can write what you should do. You should give yourself enough time for study and some time for activities you like to do.

In class, you have to listen to the teachers carefully. Also, try to answer the questions they ask in class and talk about your ideas. You will be someone interesting for the teachers and someone special for your classmates. 

Try to make friends with your classmates. If they don't like to make friends with you, it's fine. Notice if there is someone whom you feel you can be friends with.

If you want to do something or you feel bad these days, you can discuss it with a friend you trust. It is very helpful to have a best friend who can reach for your hand and touch your heart. 

Invite your friends to your home or ask them if they'd like to hang out with you. Other times, do homework with them in the same time or place. You could give them ideas and they may have helpful thoughts that would help both of you.