I'm not sure exactly what you mean, but I don't think puppy love is the same as genuine love, and I don't think genuine love ever changes. It is an unchangeable principle. That being said, I think on an individual level love can change as one comes to understand what real love is and how it has impacted their life and the lives around them.
But I read somewhere that there are different stages of LOVE, for example: One gets married and its passion (red hot) but as the years go by that fire dwindles and thus the change...its still LOVE but at a another stage.
My friend's father once told him, "It took me 29 years to fall in love with your mother." I think initially, we are struck with puppy love, lust, and/or infatuation. Only after years of co-habitation and compromise do you begin to appreciate the other person. So, yes, I believe it transforms over the years and ultimately becomes a partnership.