Characters and Chapter 1

We're best friends, we treat each other more like what siblings did. They love each other as friends. But when they knew that they're getting married. Everything changed, he treat her like strangers, he's so cold to her, it's like they didn't used to be friends before. He only wants her to be friends. He love someone and that's not her.
Then when they divorced he felt so empty but she always hanging with other and it looks like she forget about him too, that when he realized that he missed her. And what will happen if they're together but the one needs to go somewhere? Should they survive a long distance relationship? What will happened next? Should they become friends again or end up together or they just forget each other?