irresistible; harry styles fanfiction

harry and jess have known each other all their lives. they have been best friends since they were just little toddlers. they soon find out that they are crazily in love with each other, and start going out. there's only one person getting in the way of them, and that's ally. she is gorgeous and popular, and also loves harry. when he makes a confession that could change things forever, what will happen?