If you listen to the lyrics, when the chick says “sooner or later you’ll be screwing around” and he says “I wont do that”.

The only thing that makes me think thats not it, is that why would you do that 4 love?? You get roses for love, not a mistress…

I will prevail… Unless this is one of those rock mysteries like Carly Simons Your So Vein, where people can speculate but no one knows who its really about…