How to hide pain behind a smile

HOW DO YOU HIDE PAIN BEHIND A SIMPLE SMILE? WELL HONESTLY I DONT KNOWBUT EVERYDAY I CONTINUE TO DO THE SAME THINGAND I WONDER TO MYSELF DO PEOPLE ACTUALLY CARE?OR CAN THEY JUS NOT TELL HOW I FEEL?I MEAN SOMETIMES I JUS WANNA SNAP ON MY FRIENDSCUZ I SMILE BUT I WANT THEM TO REALLY ASK AM I OKAY,I JUS WANT SOMEONE TO REALIZE THAT ON THE INSIDE IM DYINGBUT I DONT WANT IT TO SHOW!MY PAIIN IS OVERWHELMINGAND IT OFTEN STRIKES LIKE A THIEF WALKIN THRU A OPEN DOOR AT NIGHTI OFTEN ASK MYSELF TO JUS EXPRESS MYSELF BUT MY PRIDE DOESNT ALLOW ME TO DO SO,SO DAY IN AND DAY OUT I HIDE MY PAIN BEHIND A SMILE SOMEDAYS I JUS WANNA CRY BUT I JUS SMILEBUT REALLY I WANNA DO THE COMPLETE OPPOSITE,I KNOW IT MAY APPEAR THAT IM JUS THE HAPPIEST PERSON ALIVEBUT REALLY IM SLOWLY DYIN AND DRIFTING AWAY INSIDE I JUS WISH SOMEONE COULD REALIZE MY PAIN!!AND JUS TAKE IT AWAY BUT IT DONT WORK LIKE THAT,SO I JUS CONTINUE TO BURY MY SORROW BEHIND A SMILE A SIMPLE DECIEVING NON-CHALANT SMILE SO I STILL WANT TO KNOW HOW DO YOU HIDE PAIN BEHIND A SMILE?