Yes its always normal,at a certain point na mag fade ang love ,but hindi naman talaga literally na ang" love" yung nag fade kundi yung interest at preferences duon sa tao ,thus the sparks seems fading and it gets a little boring ,love grows and evolved over time,do so you have to make adjustment ,kaya nga may sinasabing let the fire burning to keep the love alive.Habang tumatagal the feeling of limerence decreases and becomes less intense that's why you need to maintain it make the bond strong.You both should be open to fears learn the underlying false beliefs that fuel your fears.This time let your heart open,to new changes,new responsibilities and be there to support each other.You must both work on strenthening your emotional intimacy,create more connection and romance.Learn to persevere and make some necessary sacrifices along the way.Recognize each others uniqueness and always value the relationship you have right now.