You knew that asking some random guy to act like your boyfriend just so your ex would leave you alone was a bad idea.
You also knew that you didn't have anything better! So, that's why you walked up to this big guy, smiled and said. "There you are! I've been looking everywhere for you, loverboy." You lean on the wall beside him, smiling up at him with a look you hoped said just go along with it.
Keegan was about to tell you that you had the wrong person, but something caught his attention. The look, the fact that there was a guy glaring at him, and how weird this seemed.
"Pfft, you're the one who walked off." He rolls his eyes and puts his arm around your shoulders loosely. "Always getting lost, you are." He looks over at the guy, glaring back at him. "Screw off."