when did I disappear

I don't know how I feel
God knows I've tried 
but I always come up empty
when I look inside
I knock at my door
but there's nobody here
when did I disappear

I look in the mirror
and I still see my face
but inside my heart and mind
there's something out of place
I used to see in focus
but now everything's unclear
when did I disappear

my hopes are tired
and my heart's overused
everything else is either
anxious or confused
my dreams have all evaporated
into the atmosphere
which did I disappear

when I wake up in the morning
I'll still be someone else
searching through the past
for some image of myself
I don't know where I'm going
but my time is drawing near
when did I disappear
when did I disappear