The song couldn't be about anything other than a broken relationship trying to be brought back together. That could mean two people, or one person and perhaps drugs -- I lean more towards two people. The "fire" being felt "around us" represents the tension between the two when they are back around each other. After an intense fued between two people, when brought back together there is definitely a feeling of "fire" and intensity -- because the past is difficult to get around -- therefore every moment together feels unatural and anxious.
The song couldn't be about anything other than a broken relationship trying to be brought back together. That could mean two people, or one person and perhaps drugs -- I lean more towards two people. The "fire" being felt "around us" represents the tension between the two when they are back around each other. After an intense fued between two people, when brought back together there is definitely a feeling of "fire" and intensity -- because the past is difficult to get around -- therefore every moment together feels unatural and anxious.