Infatuation encompasses fear and anxiety and tension and stress, all the negative emotions that come with that hormonal rush of infatuation, along with the joy and pleasure of loving someone. There's nothing wrong with pleasure. Pleasure is good. But that's very different from having a committed relationship,which takes skill and maturity. Because of your work, I'm sure you hear a lot about conflicts within relationships.
Conflict can be an intimate experience, and it can be healthy, or it can be unhealthy.
I've known couples whose only source of intimacy was fighting with one another for their entire 50 years of marriage. When it comes to anger, healthy couples do things differently than unhealthy couples, or couples that don't last long in a relationship. Healthy couples build a trust with one another. The partner can hear it as a message about the sender, and not as criticism of them, so that they're able to respond in a compassionate, loving way, to the anger that's being expressed to them. That's what healthy couples do.