I feel like a living dead.

Can't even display my true feelings when i'm so upset,
i still have to face work positively,
i still have to face people positively,
i still have to face the future positively.

But

Deep inside i really want to give up everything,
go to somewhere and hide myself,
don't want to go to work,
don't want to go to school,
don't want to take my exams,
don't want to eat,
can't get to sleep,
but i can't face the consequences if i do all these stupid things.
I'll be letting down a hell loads of people just because one person let me down.

what should i do?
what can i do?