You wouldn't understand.

"Come with me!", Ezor said, with a desperate look on her face. She wasn't ready to let go, never was and never would be. Not of her best friend...
"I told I would stay home!", Acxa answered in a cold tone without any emotion but a voice that told anyone she meant it. And she wouldn't change her mind.
"But... that's what we've been dreaming of since we were little? Why, Acxa, why are you wanting to stay behind so badly?"
"You wouldn't understand."

That were the last words Ezor ever heard from her once-best-friend, just before they never saw each other again in a very long time.
Things were complicated when they left, but they haven't always been. And Acxa needed to be alone, that's what she figured out herself. And no one should stand in her way.
Yet, when it comes to Ezor, she has always been weak. She was her weak spot. The part of her she didn't want to have because it made her vulnerable. But she also wanted her so much it hurted, because she was the only person that maybe, after all they've been trough, understand her. Out of all the persons, it was Ezor, if even.

When they parted, Acxa expected things to get back to the way they used to be and to get less complicated, but they didn't. She just felt that someone was missing, and that's it. There was something like a hole in her heart that kept her from letting go...
And things got more complicated when Ezor came back... from a live-changing trip, after many years. All around the world. They really have been dreaming about this all the time... but that was the past. And still... something seemed really off about the trip and Ezor herself.

So Acxa starts questioning what has happened to her best friend...
Whe she wasn't even ready to face the truth.

[Ezor and Acxa are characters from the Show "Voltron" which I can highly recommend. It's not needed to know the show as the rest of the story rightfully belongs to me and has to do little with the actual plot.
Enjoy!]