God sent his son to save us from destruction. He proved his love towards us by sending Jesus as a sacrifice for us. To love each other properly, we need to arm ourselves with the same mindset. Sacrifice is the highest level of love. Infatuation, crush, physical attraction and the like, are good but can't be depended on as a foundation for lasting relationships. You can love someone even when you're angry. That's agape love. Infatuation is called chashaq and can never hold a marriage.