On Being In A Relationship With Myself

It is written in many self-help books and spoken as a mantra in many weepy rom-com movies that, "you cannot truly love someone else, unless you learn to love yourself". But what does this look like? How long would you last in a relationship with yourself? Maybe the mantra should be rephrased, "you cannot truly love someone unless you have been in a relationship with yourself" 

My ego is too frail to admit that being in a relationship with myself would not be that healthy. We would spend far too much time losing each other as we get distracted by things in parks, stationary or hardware stores. Arguments would be conducted in a silent passive-aggressive tone and one of us has to be more serious than I am.