This could be about a man and a woman fighting a sickness like cancer, so that the man doesn't die. There is explanation to this because of various phrases. "The last thing I heard was you whispering goodbye, and then I heard you flat line" "Don't close your eyes" "Not gonna die tonight, we're gonna stand and fight together". It isn't just about reality, it's about things that you should cherish before they go away. It's very similar to fighting any sickness or disease. It could include depression, bipolar disorder, suicidal thoughts, and other things that people try to fight. People don't realize that this means so much more than just being a song. It means that we have to fight for people. This means a lot to me because my grandma died of brain cancer in august, and last year. It means more to me than a song could. There may be more meaning to songs than we thought. When you think about the song's meaning, come back and talk to everyone who thinks it has a meaning. Fight or flight (which means just letting it overtake you) is the only option, and many people pick fight. Bye! Don't forget to think about the meaning!