I think this song is about two people who love each other very much, and though there are ups and downs in their relationship ("Sometimes I forget to love you like I should, but I'd never leave you"), they still would never leave their partner because they love each other so. But there's ALWAYS that underlying fear that the other will leave him/her, presenting itself in their dreams where they can't control things and see the rational side of things. But when they wake and see their beloved, who hasn't left or cheated on them, they probably love and appreciate them more. So they need to be reminded by the other one's presence that says they won't leave.
I think this song is about two people who love each other very much, and though there are ups and downs in their relationship ("Sometimes I forget to love you like I should, but I'd never leave you"), they still would never leave their partner because they love each other so. But there's ALWAYS that underlying fear that the other will leave him/her, presenting itself in their dreams where they can't control things and see the rational side of things. But when they wake and see their beloved, who hasn't left or cheated on them, they probably love and appreciate them more. So they need to be reminded by the other one's presence that says they won't leave.
It's a cute and beautiful song, I like it.