I feel lonely. 我感到很寂寞。 I hate being alone. 我讨厌孤独。 I don't mind being alone. 我不在乎孤独。 I miss you. 我想念你。 I feel empty. 我觉得空荡荡的。 My life is empty. 我的生活很空虚。 Alone at last. 最终只剩下了我一个人。 I'm depressed. 我很沮丧。 I've got the blues today. 我今天感到很忧郁。 It's depressing. 这真让人沮丧。 Rainy days get me down. 雨天使我感到消沉。 I don't feel like doing anything. 我提不起精神来做事。 He looks melancholy. 他满脸忧愁。 He looks gloomy today. 今天,他看上去很郁闷。