I think it's less likely to be about love. Dan Reynolds grew up with a lot of dark turns in his life, hence Radioactive being about his overcoming of anxiety and depression. This song is possibly telling about the following:.
He is talking about his depression, his sorrow, and his life. And about cutting. "I'll bleed out for you" is not talking about a woman, or a man for that matter. It's him saying to himself "I suck, I'll cut and watch the blood escape for all of you that hate me, because you're right." When he says "So I bear my skin, and I count my sins, and I close my eyes, and I take it in" I think it means "I 'bear my skin' (he's getting his wrist out so he can cut it), I tell myself everything that's wrong with me (counting my sins) I close my eyes, take a breath, and slice my wrist, taking in the pain that I deserve." I don't think this song is a girl, it's him. He is bullying himself because others are and he believes it. This is a song about cutting, depression, suicide, and self-hate.
Bet that's not what you thought. But that's the kind of band Imagine Dragons is, because some people have crap in their life and not everyone writes songs about love, drugs, murder, and the nasty, unlike all modern singers on the radio (okay, not all modern singers, because: Shindedown, Simple Plan, Fall Out Boy, Avicii, etc. They're still modern, but not enjoyed by the majority because they're unique singers that don't just sing about breakups.). Read more →