Imagine supporting your friend through a breakup, and then proceeding to date your friend's ex. That is the context for Wildflower, and Wildflower is the name of the company which Billie's friend ran. The lyrics contain two perspectives, one being Billie Eilish, and the other being the friend's-ex-turned-boyfriend. I split the solo into two parts based off that.
Performance wise, really try to bring out the dynamic contrast, and don't afraid to really sing loudly on the peaks of the phrase.