I would argue that to miss someone is a form of grieving.  So many of our emotions are related to a sense of loss however real or imagined.   Although we may be able to conceptualize that a separation is temporary that fact may be of little solace to one's body.   To long for someone is synomnous with grief. Desire is rooted in a want for something that is lacking.   To miss someone is to ache for them.  To both reject the notion of being parted and to be compelled to correct this error.  Yet we so often can not.   Our bodies protest.  They cry out for regularity,  to right this wrong, to motion to correcting this sense of loss.   Perhaps this is why I feel justified in saying that parting from you is a little death that I am still grieving from. That I am attending a funeral no one else can see.