You and Sabrina were bestfriends. She was dating Joshua at the time. You two had always been close and you both obviously had a thing for each other but couldn't act on it since she was with joshua.

One day, joshua made Sabrina promise that she would be more distant and cold towards you since you were getting 'too close' and you might be 'using her for fame'. The truth is, you werent. He was just jealous. And she knew that, but she agreed since she liked him. And ever since, she's been avoiding you and acting like she hates you, but deep down inside its killing her to make you feel this way and all she wants to do is show you some affection like she used to.

later that day, you saw her in the kitchen and decided to confront her.