The Neighbourhood - Fallen Star Lyrics Meaning

In my opinion, this song is about a failing relationship in which he wants really badly to have saved, but realized in the end that the distance brings fondness and it's in their best interest to keep in contact but not as close as they were before. Also they are fading lovers who cannot stay away from each other. "You're in my DNA, I can't keep away no matter how hard I try." I believe this refers to how he believes they are part of each other. Metaphorically