I think it's possible this could be her longing to be with this person. She speaks of this "floorplan" because she wants the other to know her, to know what's in her head and heart, and to know what makes her happy.
The line, "I want your lungs to stop working without me," suggests that she wants them to need her, to not be able to breathe without her.
Though, although she wants this, she is too scared or shy to actually go for it. She won't say what she really wants or how she really feels even though it brings her pain to hold it in. She knows she shouldn't walk away from it, but she will.
It could definitely be about a break up as well, but I like this interpretation.
I think it's possible this could be her longing to be with this person. She speaks of this "floorplan" because she wants the other to know her, to know what's in her head and heart, and to know what makes her happy.
The line, "I want your lungs to stop working without me," suggests that she wants them to need her, to not be able to breathe without her.
Though, although she wants this, she is too scared or shy to actually go for it. She won't say what she really wants or how she really feels even though it brings her pain to hold it in. She knows she shouldn't walk away from it, but she will.
It could definitely be about a break up as well, but I like this interpretation.