Living in the Past. (Harry Styles Fanfiction)

What happens when the only person you ever trusted just leaves , never to be seen again. They kinda just leave without warning. Isabella and Harry knew each other since birth. They decided it was time they start a relationship when they both turned 15. They had a relationship the everybody wanted. It was somewhat of a dream. They loved each other and the other knew it. So what happens when Isabella and Harry turn into Harry and whatever happened to that Isabella chick. ------------------------------------------------------------------------------------------------------------------- He promised they would keep touch. But they didn't . He promised a lot of things that he didn't keep. Isabella never was able to put her trust into anybody again. She met friends along the way but none of them, had the bond that they used to have. What happens when they cross paths again almost 4 years later. But what else happens when an Irishman gets in the way. Will they make it back together ? Even if they do will they only have the past?