Human are dynamics creature, eventually they would change. Our silly little hope is what makes us hold with the thought of them being the same years after years. They were meant to change, but our feelings run loose as we never realized they changed since long ago.
it's because.. life happens. you meet new people, try new stuff, and then you're seeing things from a whole new perspective. that's just the way life goes..
It's important to recognize that change is a normal aspect of life, and that it's frequently influenced by an assortment of internal and external variables is crucial.