Jesus calls all of us to holiness, to love Him as He loved us. He loves us first and patiently awaits us to love Him back. By grace we find out about His love and, though imperfectly, we try to correspond. We yearn to know Him intimately and to do what pleases Him. We open our ears and our hearts to His loving words and caresses. He wishes to give us so much if only we ask (1 Jn 3:22) and He himself taught us how to ask (Mt 6:9-13), by turning to Him to give Him glory and to present our petitions.
But sometimes, we have nothing to ask for, all we want to do is to be with Jesus, to caress Him with tender and loving words. And He invites us to do this more often, daily, every few hours even. This is when I guess we can say that we have a prayer life.
Without prayer, it's virtually impossible to grow closer Jesus. It's as though the soul is not watered and remains in the shade, away from His refreshing infusions and from His life-giving light.