Listening to music late at night easily makes you emo.
Tips
culture
Borrowed from English 'emo' (emotional) but in Chinese internet usage it simply means feeling sad, melancholic, or in a low mood. It doesn't carry the Western subculture associations. Went viral around 2021 as a catch-all for 'I'm feeling down.'
usage
Used as an adjective or verb: 我emo了 (I got emo / I'm feeling down), 别emo了 (stop being sad). Much softer than 抑郁 (depressed) — it's casual and often semi-humorous.