I believe love doesnt have to change either! But inevitably for some reason it always does whether its or growing or shrinking it always changes! I think there is only one relationship in the world that never changes and that is the love God has for his children. Now i'm not being churchy or religious or anything but ya know I would always like to believe that no matter how much we screw up or turn away from God he will always love us unconditionally forever no matter what!