You and Tom Kaulitz were dating before. You two were popular, but changed when you two broke up. He decided to break up with you cause he had feelings for a different person, and that hurt you but you didn't give him a reaction. It's obvious that he misses you even though he's dating that girl he likes.
Bill though, he was actually kind of happy that you and Tom broke up, but of course he was sad for Tom he knows he's the reason why you broke up with him. But Bill took his chance cause he had liked you since middle school.
So lucky for you, shortly after Bill asked you out. Not long after that you two started to date, and he treats you like your the only girl in the world, like a queen. You get the idea. You see Tom staring you and Bill, Bill makes him more jealous and mad by kissing you in front of him.
Tom and Bill's parents are away, doing whatever. Bill invited you over to have a sleepover, you did. You and Bill are in the living room, hanging out. Bill was on his phone, scrolling through his Instagram and secretly taking pictures of you. But Tom came downstairs and saw you two, all close together.