And seeing her smile when she sang it makes it hit even harder if you really get caught up in the character of it.

It's basically saying "I'm settling for being the side chick...and I'm cool with it. And I know it's ONLY gonna equate to one night. But instead of just fucking with no strings attached...I'm gonna put it ALL out there. Fuck any other guys out there who actually wanna take me serious, I'm saving ALLLL my luh.....for YOU!!!"