Love isn't a state of perfect caring. It is an active noun like "struggle". To love someone is to strive to accept that person exactly the way he or she is, right here and now.
The true source of joy is love -- love of God, love of beauty, love of wisdom, love of another human being, it does not matter which. It is all one love: a joyful awareness of dissolving boundaries of our ordinary narrow self, of being one with the reality beyond, of being made whole.