In a "dating" relationship they use to call it puppy love because because so many years ago couples were not as adult in the scheme of things and they did foolish, mindless games with each other in that younger generation.
I myself "fell in love" when I just met my husband now/boyfriend for the first time at 23. He was all that I was looking for and except for a few flaws, he became my husband four years later. We've never been more in love, give each other space to do our things; whether it's to go shopping with my daughters or do some reading! Married now for almost thirty years love has remained in our relationship and has been there to get us through many stresses.