Don't

Beth and Alex were best friends.
Beth is a kind and sweet person that mother's adore.
Alex was the same but now he is a jerk.
Alex left Beth when they were 10 years old and made a promise to her .
Now he is back when they are both in high school.

What happens when things happen to Beth and Alex.
Will they be best friends again ? Or will they hate each other forever ?
What is this promise Alex made to Beth ?

(Beth in Back Again is not related to this story ) .