I swear to you Human beings are the worst kind of drug.  There is no substance that can make you feel as high as the affection another person may share.  And, there is no hangover as headache inducing as the subsequent fall from their grace. From disappointment to excitement you may only understand the full spectrum of experience when it is shared.  Yes, there are many states of solitude which are necessary and unique but we have never existed singularly and never will.