Long term relationship, no fights!

Hi so I've been dating my boyfriend for almost a year now. We get along so great and have never had a fight. We just talk things out until we both feel better and always voice our concerns. Our communication is really great. However, I heard that not fighting is unhealthy for a relationship... Is that really true? Is my relationship with my boyfriend "doomed" because we don't fight? I'd love to hear of personal experiences!☺️