Frozen in time?

Somehow it feels like when you are making a new acquaintance you set the rules in stone and they cannot be changed. You create relationship roles, patterns of behaviour, you get to know the person, well at least who that person is at that moment in time. But for some reason we don´t really notice the changes that people around us go through. Some people may think that a person can never change, but I don´t believe that is correct. It might not be an earth-shattering 180 degree transformation, but it is a pity that we generally don´t notice the small and yet important things that are different. For some reason we get stuck in time without the ability to change our perception of someone.