Mack boy
A mack boy is a guy who thinks he's the main character of your life. But he's just a sidekick who can't even get the plot right.
He thought he was my favorite, then I found out he was my friend's favorite too.
He texted me every day, then I found out he was texting my mom too.
He said he'd be there for me, then he was at the concert with his ex.