To me the song means something like he knows he is a sort of 'bad boy', he "could dance all night". And he meets a girl who is really into him, so she "dances all night" and "smokes it up" aswell.
She's "come to kill" - she wants a good time with him, or the kill reference could refer to how it affects him everytime a girl he likes goes in and out of his life.
They know her family are upset about it all and her parents convince her that she is being self-destructive. He understands because there is a sense of inevitable loneliness about the path he has chosen, having short term relationships with women "no matter who" they are.
And so he takes her home back to her family. While he resolves that he'll "keep on" doing what he's doing.
To me the song means something like he knows he is a sort of 'bad boy', he "could dance all night". And he meets a girl who is really into him, so she "dances all night" and "smokes it up" aswell. She's "come to kill" - she wants a good time with him, or the kill reference could refer to how it affects him everytime a girl he likes goes in and out of his life. They know her family are upset about it all and her parents convince her that she is being self-destructive. He understands because there is a sense of inevitable loneliness about the path he has chosen, having short term relationships with women "no matter who" they are. And so he takes her home back to her family. While he resolves that he'll "keep on" doing what he's doing.