When are you?

 

When the wind blows, sometimes I think it's you.

When the dog barks, sometimes I think you're the one outside my door.

When I become afraid, sometimes I think you'll be there to comfort me.

When I close my eyes, sometimes I think I'll see you when they open.

When I fell in love, I know it was with you.

When I feel lonely... I know I'm missing you.