Why can't I remember your face?

Dark black hair,
Black eyes with long black eye lashes.
Aaah!
They make my heart skip a beat sometimes.
Okay, you wouldn't know,
until I tell you.
Your smile, catches my gaze,
movement of your lips,
makes me sweat in cold winter days.
It is going so fast,
that I can not understand it.
But who said,
that you need to understand each and everything?
Can I imagine you sitting there?
I don't think I can.
Though you were here a day before,
and you would be here again,
Why can't I remember your face?
Is it my bad memory
or something else
of which I shall be afraid?