The phrase [どれが恋かがわからない](javascript:void(0)) literally means "I don't know which one is love." It is used to express confusion or uncertainty about identifying which feeling or person is truly love. This phrase is also the title of a Japanese manga series by 奥たまむし (Oku Tamamushi), which revolves around a female protagonist who is romantically pursued by multiple girls and struggles to understand her feelings and which relationship is genuine love. The manga explores themes of love, attraction, and relationships through a comedic yuri (girls' love) lens.

In summary, the phrase means a state of being unsure about which feeling or relationship constitutes real love, often used in contexts of romantic confusion or complexity.