This Pain in my Chest

Can you tell me what this pain in my chest is?
I feel it when I look upon your face, you picture
And when I close my eyes I see you there

Can you tell me what this pain in my chest is?
I feel it when I hear a song of love and happiness
And when I sing the words of love hurt me

Can you tell me what this pain in my chest is?
I feel it when I lay alone at night in my bed
All cold and empty in the darkness

Can you tell me what this pain in my chest is?
I feel it when you are close and I hear you breath
And the sound of your voice leaves me speechless

Can you tell me what this pain in my chest is?