I can't concentrate not only on studies but not even on other things I am in seventh
I lack encouraging friends whatever I think of doing I get bored of it and skip
e.g. I think of studying ,study , get bored, think of taking notes, take notes, get bored, think of reading storybook , get bored , chat on net get scolding and my whole day goes bad I ant pay attention on one thing I used to be a class topper I am nomore

What has changed?

If you used to be top of the class and now are not,what has changed?

You may need to look for some study skills from your teacher,setting goals and time frames for study.

Finding a balance is important,time is not the issue,balance is.

You sound like me when I was your age. RedHead is right, finding a balance is important. Also, having the computer right there turned on when you're bored is not a good idea.

Try your best. Don't compare yourself to other people, with grades or anything, the best way to do your best is to aim for a personal best, doing better than you had before, or doing something purely to create something better in your life. You should try to find a way that your studies connect to you, and maybe find something that interests you about it even if it's one thing. Try to find something that interests you and make it a goal to do it after you complete a studies. Try to relax. Try making some goals for yourself. Try to figure out how doing your work will benefit you in your future. Just try to be happy, and do your work. When you say "then I get bored" what does that mean specifically. What do you do once that point is reached? You will accomplish more by doing your studies then getting bored from them. Try surrounding yourself with close family members, and try to talk to people in your classes, maybe make a new friend. Good luck!