"I Didn't Change My Number" is a song by Billie Eilish from her album "Happier Than Ever." The lyrics portray a situation where the protagonist is distancing herself from a toxic relationship or friendship. In the song, Billie expresses that she didn't change her phone number as a whole, but instead changed who she chooses to respond to. This implies that she has chosen to cut off certain people from her life. Laura, a friend of Billie's, advises her to be kinder, but the suggestion doesn't apply to the person the song is directed towards. Billie reveals that she enjoys receiving texts from this person asking if she is mad at them, indicating that they are obsessed with her and perhaps seek her attention. The chorus emphasizes Billie's lack of sympathy towards this individual. She suggests that they should leave her alone before she becomes mean or hurtful towards them. The repetition of this message in the chorus reinforces her firm stance. Billie further emphasizes her changed beliefs and perceptions, highlighting that this person appeared attractive but looks can be deceiving. This suggests that they weren't as genuine as they seemed. The lyrics also mention that Billie has to focus on her work and that this person doesn't deserve to feel so hurt. They are accused of having the nerve to expect or demand a certain level of attention or care from her. Towards the end, Billie mentions Drew, presumably another friend who warned her about this person being bad news. This could imply that she didn't listen to Drew's advice initially and now regrets not leaving this toxic relationship sooner. Overall, "I Didn't Change My Number" conveys a sense of empowerment and the importance of setting boundaries and prioritizing one's own well-being.