I think that it is about moving out of an apartment, but it's also about an internal moving out too. You're moving the thoughts of you and her out of your mind, and when he sings "Someone else can hang pictures over the holes in the walls." I believe that he's singing about how someone else can be in his heart later.
But the song is def about realizing that you love someone and wanting more after the "last kiss"
I think that it is about moving out of an apartment, but it's also about an internal moving out too. You're moving the thoughts of you and her out of your mind, and when he sings "Someone else can hang pictures over the holes in the walls." I believe that he's singing about how someone else can be in his heart later.
But the song is def about realizing that you love someone and wanting more after the "last kiss"