Yes, people change, I change and we all move on. There's a movement in life just like there is a movement in friendships. Even though people in my past have gone (and some still linger in my heart), I am always meeting new people and building new relationships everyday.
In order to love myself unconditionally, I have to be my own cheerleader, my own saviour, and my own best friend. I can't rely on anyone else to fill that best friend void, so if you are feeling or have ever felt what I feel, I suggest you be your own best friend.