"Let it Go..."

"Well, I've been afraid of changing
cause I built my life around you
But time makes you bolder
Children get older
Im getting older, too
Well Im getting older too"

The chorus to the song "Landslide" has been one that I've been familiar with for a while now, but I never really perceived it's meaning until a few weeks ago. In light of recent events, I've been endowed with a whole new outlook on the song.
Change has always been something that has bothered me, simply because I like where I am and get complacent with things. Even the slightest changes to my daily routine or environment leave quite a distinct impression on me. Losing the "little people" in life, the ones that you know but don't speak to much, might be easy for some people. I'm not most people. Even the smallest person that I only greeted once in my life leaves a gaping hole in my soul when they disappear from my surroundings. So, what more if the person that I lost was the dearest one to me of all?
I've heard it from my mother before, "Don't trust anyone too much. And never let someone get so close to you that it's like they're your very heart." She was referring to best friends from her experiences. I always found this advice difficult. It's hard for me to not get attached and give my heart out to my friends. I love trusting everyone. It's because I think that everyone is good. I don't think that anyone around me is bad, or capable of any bad intentions. I don't think that anyone would ever hurt me. At least, that's what I thought.
After losing my best friend because she changed, my eyes opened. The entire time that she was betraying me, I refused to see it. Everyone else was angry at her on my behalf, since I was too "innocent" to be angry at anyone. I wasn't even sad at the time, just confused and very disappointed at what happened.
In the week afterward that we had not spoken, truly not spoken, not even to sort it out or get angry at each other, I felt something had to be done. A face to face confrontation seemed no good, and no one answered when I called, so I resorted to messaging.
All I tried to do was ask why this had to occur and why she felt that she needed to act that way against her best friend. Naturally, I said I wasn't angry, never would be, and could never harbor any negative feelings towards her. But things did not go so well. She bit back with fierce words, the meanest I had ever heard. And still I was not angry at her, just confused. In the weeks to come, I would not let it make me sad. But, things catch up to us eventually, especially emotions. When it finally made me sad and shed tears, four weeks later, the only thing that I kept coming back to was a particular phrase that she had said. It was....the meanest thing that I had ever had said to me, but to make it worst, it had come from the person that I had revered dearest to me. Where is a person supposed to turn to when the worst words of all come from the main source of their comfort?
The sad, unfortunate reality is that we all must deal with these sort of things on our own. Consolation from others will only get us so far. However, it won't help unless we further the action, and in so doing, learn to let it go. I don't know if I am ready to do so, as reminiscent as I am. It might take a while. But what can I do?
I felt very decentralized, because I lost the center of my actions, my best friend. It's very hard to recuperate from such a loss, even if it is only socially. How odd, to have them there, but never again to be yours....it's terrible