@thescotty4444
I never got that! Now that you say that, there are a bunch of indicators of that. "After every hit we take", "All the feelings that I get", etc, etc. You are completely right. Instead of a song about relationships between two human beings, they could be talking about how 'missing it/you' is really not letting it go and being addicted still. Considering Three Days Grace's other songs, I wouldn't be surprised if it really were about drug addiction. (Painkiller, probably the most obvious of the bunch, possibly Never Too Late, although that's more about anything bad that happened, and Over and Over, which could be interpreted, instead of a love song, of relapsing after rehabilitation and getting addicted to drugs over and over again.)
Thank you, sir. You just made my day with this theory. I'm probably going to be thinking about this for a lot longer than I should ponder anything like this.