Change occurs in everyone's life at some point, it is all just a matter of time.
Change can be good or bad depending on your perspective.
Change can occur in a matter of ways:
It can affect your relationship, friends, and yourself.
When changes occur in relationships, if the change is for the better, then both lovers have both grown not only as a couple but as individual and have become in sync with each other as one. However if those differences emerge on extreme sides, then the passion and unity is slowly drifting away from each other like smoke in the air.
When you realize you have changed with your friend's group, it indicates that your mentality has changed or values or beliefs. You are who you surround with.You leave some people and encounter people in the most unexpected moments in life that become your best friends or leave as a valuable lesson that can be useful in your life later on.
Realizing you change is an epiphany or soul awaking after you have self-reflected for some time. Self-reflection comes within and it is not an easy thing to do, it requires alone time and thought process. It allows you to grow from within and can expand your creativity. It allows you to gather your own inner thoughts and it is a humbling process.
You may not be the the same person as you were are a year ago and that is fine because at the end of the day we all evolve at some point. Remember the time you spent here with people and self-reflect. Memories come and go, but lessons are there forever. Be true and do you! Positive vibes :)