I have a few! First that came to mind was "decode" by Sabrina Carpenter. For me personally, it's just because I can relate to the song a lot. Nonetheless, I think it's worth it to check out her most recent album. (You might have listened to "Nonsense", it's in the same album! A song titled "opposite" is also good.) Second, for a confidence boost, I'd say "Players" by Coi Leray and "What's New" by Megan Thee Stallion. Third, since Taylor Swift is releasing it soon as a single, "Cruel Summer"! The bridge is just chef's kiss. All-in-all, I think I don't have many songs that are my current favorites that I could recommend, but I have a whole lot of sad songs. Feel free to hit me up for any kind of sad scenario. I'll find one that will fit it best. ☝️