We've learnt that we don't have to change friends if we understand that friends change

Change is inevitable.....isn't it? Both of us went for a gathering recently where we met a few of our old school mates.Some of course haven't changed at all..They're still the same crazy people we used to know fromback then. It makes way for one to take a long stroll down memory lane of how beautiful school life was......with no worries, and all the fun times we had together.It Just makes one want to go back and live through it again... But the sad fact is that we all have to move on and leave it all behind. Then, there are people who have matured and forgotten to keep alive 'the child' in them and have become too serious that they just don't really see the importance of having fun in life anymore,which is really sad ... And then, we have people who begin to reveal a part of their true personality that we never saw before.. people who turned out to be nice have suddenly changed.....for the worse. I should say this sudden shift in their personalities is astounding as you begin to think.."what happened to them?" Why do we see a sudden change in them?? It makes life so depressing. Those who seemed to be really nice before and those who were close......are just not the same anymore. Where on earth did things go wrong? Well atleast one thing remains the same??Jay and Jinie are still the same!!!! Heheheeee?Touch Wood.... Maybe a little nuttier, and definitely a bit more mature. We have no clue as to why people change, but one thing that we can say is - never change your self. Be the same as who who were when you first met your friends and thats the best gift you can give him/her... :)Anyway guys plzz let us know why some people tend to change and be different??? And if there are changes..........may it all be for the better....:)