You were dating Zayne before you became an idol. He was now your ex boyfriend because he cheated on you. You have move on from the break up and you have a happy life with lots of fans and love from people but Zayne hasn't move on. He was still in love with you that he was soo desperate to get back together with you. He regretted his action and when he found out that you're famous, he didn't hesitate to go to your fan meeting.