Its a song just like most young lovers feel. The guy and girl are deeply in love, and everyone else says they are fools. But the guy doesn't care, and he's telling the girl how he doesn't care about what they say about them and how they shouldn't be together and that they are too young to know about love. When he see's it as they wouldn't understand it. Even if they told the people what about how they are, it wouldn't matter because they wouldn't get it. And in the end it doesn't matter because they don't matter. Just the guy and girl matter.