I´m pretty sure that guy came home to the following:
"I don´t have feelings for you anymore"
"You are so nice, let´s keep on being friends!"
"Ohh yeah i´m together with your best pal now"
"Okey, okey, maybe you did´nt cheat, I mean you were in that house the whole time so I must just say the truth, it was me who cheated"
THE BEST QUOTE OF THE EPISODE:
SOME GUYS MAY THINK I´M A WIMP BUT OTHERS MAY THINK I´M A HERO !