All In Your Head Lyrics

Lyric discussion by shikonaori 

Cover art for All In Your Head lyrics by Rooney

I'm gonna go ahead and say this is about a 'friends with benefits' kind of relationship. He was just fucking around with her, and she expected something more. He, of course, isn't being a total ass and is trying to make her realize he never wanted it to happen this way in the first place - "I told you from the start / That I'm not your boyfriend".