Hi Aspirant

You can do it by reducing number of  friends by saying that you are busy with family stuffs or by saying you can't meet them because you are not well.You can make simple excuses.You reduce usage of social networking site.

It is really very important when you are in class 11 and 12 .Ask your mother and father to tackle your friends .If you dont want to say anything by yourself.Tell your mom to pick your friend's call.You mom can manage everything.Tell her your problem that you want to study and not to be disturbed any one.She can sort all your problems in one go.

All the best.

Hi Eshi...

U will get to know slowly that Not everything u have will be permenant,even the friends.The only people those stay with u will be ur family that too in particular, it would be only ur parents.

Don't waste ur time hanging out with friends who waste ur precious time. Stay with people who try to get the best out of u and help u achieve ur goals.Don't stress out that much on toxic people.Focus on ur goals and try to achieve them. 

The satisfaction & Happinesss that u get when u achieve ur goal is nothing compared to that which u feel as 'so called happiness'.

All the best!!

Dear Eshi,

Greetings.

Its good to know that you are that much dedicated for studies. Look, friends are also important for our lives but everything should maintain a time as far as you are a student. Plan for your aim and stick to it. Many things will distract you, let them do but you should not compromise with your studies at any cost. Friends are those who support you in right practice. Ask them that you need some time for studies too, If they are not agreeing with you. Its better you leave them and focus on your studies. Understand the value of time, Work hard today for better future.