I have just started to catch up again with people that I knew back in the day and it's interesting...
There are are about 3 different ways I classify the "catching up" - the two friends have both totally changed, the friendship has the same ease and intensity even though the two friends have grown, or one person was caught in a time warp and the other moved on.
The last is the strangest. I look back on my life with relief at the fact that I'm different now. Yes, I'm the same in many ways but I've grown up (or you could just say 'changed';-)) and my outlook on life is different now. It's disappointing to realize that others can stay exactly the same and expect me to be the same in every way.
I love and appreciate the friendships that I have where I can call them at any time and they know exactly when something's wrong, what my reaction would be, and just the little things that make me myself. But for those friendships to grow, they need to realize that changes will come - we will grow up, our reactions to life will mature (hopefully), and we might even change a few of our old (less important) values.
Somethings may never change about me: my room has hundreds of books and photos, sunsets make me smile, I hit my leg when I laugh my hardest, notebooks call my name at un-earthly hours, sarcasm is my second language (unfortunately), and certain types of people still have wild cards. Those are a few of many things that have lived on through my close friendships.:-)
But I've changed in some other ways - and I'm growing up now (or trying to;-)).
Or maybe I'm the blind one that really hasn't changed at all...;-)