Out of sight, out of mind

I thought I heard your voice amid the noise out on the street
I imagined it at best, but the knot in my chest still skipped a beat
I cannot concentrate or think at all of late for the thought of you, though it's been so long since the day I found you were gone when I came to
Last night, I saw your face
But something was wrong that I could not quite place
Suddenly I began to realize: the eyes I did not recognize
I woke up with a start and a pounding heart, gasping for air
I thought you were a ghost, or a dream at most, but you're everywhere
Was that you just then, calling me again?