Lyric discussion by phuzzy_duckz 

I believe this song is about a breakup and Kellin Is telling the girl she still has all of his heart even after she broke it, and he is reflecting back on their past memories together and it makes him happy to imagine that they are still together, I found this song similar to me with my ex, she's never coming back but she still has all of my heart, and I miss her.

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