The body decays and rots.
Or if it has been embalmed, it is put into a casket and buried.
Or if may be cremated until nothing but ashes (basically) are left.
As for the "me" ... well, NO ONE knows if there is life after death. Or if there is, what it may be like.
I haven't died .. have you?
Unless there IS life after death, none of will know until we do die.
And if there is NO life after death, then no one will exist after death, so there will be no one TO know.