SHE BELIEVED, HE LIED. Kim Jaejoong said that he loved her... Why... Why did he break her heart ? < 3 Choi you is a girl who was jaejoong's girlfriend. She has always loved him, and she has always had time for him. One day, she realized that he wasn't really in love with her... What did she do? She dumped him. Because HE LIED.