Do not give all such things which gives negetivity in ur life. All students are the reality of life,they tease u,but u have to calm and quite and must have control over ur emotions. If u can control it then u can handle any situation with ease.Remember one thing that intelligence never failed u.If u are intelligent then u must shine ,no matter whatever the marksheet shows.

Hi It's just been reinforced in your head and you have over thought about this. It can be undone. Don't worry I suggest you to Consult with me or any psychologist for therapy and counseling All the best

Hi dear, I understand that you are going through a lot of self doubt. When we are doing good in our studies, our friends find it difficult to accept and appreciate that. So instead of accepting that they are jealous,they are targeting you. But you don't have to get caught up in that. Please believe in yourself and give your best. Don't worry about marks. Study to learn. There are so many children who still don't get a chance to study. You have a wonderful chance to learn through your subjects. Best of luck.