I see the song as being from the perspective of someone who has just been dumped by their lover. The song explains the relationship and hints at its being toxic and not healthy with his lover's anxiety which is reflected in both her worry over what people think of her and their relationship and her possible eating disorder (hinted at with the lyrics "I'll stop eating food and I'll squeeze into a dress so I can be like you"). The other person (Ed's perspective) also hints at having his own issues when he says that "he'll give up and be frustrated" where Ed is admitting to having his own problems and that the relationship had problems with both of them. The song goes on with Ed confessing that he believes he is in-love with his then girlfriend and it appears that Ed is trying to understand why the relationship ended as he is putting himself in his lover's shoes to "be like you". By the end of the song Ed comes to the conclusion of how toxic the relationship is and he understands that his lover left him because she loved him and so she loved him enough to walk
away before she hurt him.
Obviously this is just my interpretation and I may be entirely wrong but this is just what I associate the song with meaning.
I see the song as being from the perspective of someone who has just been dumped by their lover. The song explains the relationship and hints at its being toxic and not healthy with his lover's anxiety which is reflected in both her worry over what people think of her and their relationship and her possible eating disorder (hinted at with the lyrics "I'll stop eating food and I'll squeeze into a dress so I can be like you"). The other person (Ed's perspective) also hints at having his own issues when he says that "he'll give up and be frustrated" where Ed is admitting to having his own problems and that the relationship had problems with both of them. The song goes on with Ed confessing that he believes he is in-love with his then girlfriend and it appears that Ed is trying to understand why the relationship ended as he is putting himself in his lover's shoes to "be like you". By the end of the song Ed comes to the conclusion of how toxic the relationship is and he understands that his lover left him because she loved him and so she loved him enough to walk away before she hurt him.
Obviously this is just my interpretation and I may be entirely wrong but this is just what I associate the song with meaning.