disappear

people just disappear.
i've seen it sometimes.
stayed with someone that i knew
in a room,
went out quickly,
reappeared
and he was gone.
after that i never met him again.
my best friend disappeared that way.
even my sister disappeared the same.
we've been appointed
and she didn't show up.
none of my relatives ever saw her again.

i'd really like to know where the people are.
i'd rather like to meet them again.
perhaps i'd even like to disappear by myself.

the only thing,
i just don't know how to do.