Just as you think that you're over it, you're fine at last, a memory resurfaces.
A reference to something you shared, and the image of laughing together fills your head.
You thought that friendship was forever, that nothing could come between you and her.
But you were young then, and naive.
Now you realize that it's inevitable; that nothing is forever; that you were bound to grow apart sometime.
But you didn't want it like this.
If you had slowly drifted apart from each other, it wouldn't have hurt this much.
But it wasn't like that.
She became your enemy, to the point where she ignored you when you tried to say good bye at graduation.
And what did you get out of this?
An entire year of your life, wasted.
Spent trying to figure out what you had done to make her hate you; trying your hardest to gain her friendship back; and trying to make other friends.
Failing
But now, you have friends, and you try to forget her.
But memories are forever, no matter how hard you try to erase them.
So, now, whenever someone tells you that they'll be your friend forever, on the outside you smile and say that you'll be their friend forver, too.
But each time, you remember her, and all the empty promises.