Where in Bobby cheates on B.I. Can they fix things? What pushed Bobby to do this?

...   He hated this situation he and Wooyoung were in. Those blank stares, cold shoulders, harsh words they threw at each other were just too much. To think that only some month ago they were sharing the same bed. Nichkhun had tried to keep the relates as friends but the other didn’t want his friendship anymore. Nichkhun felt bad but Wooyoung was just making it worse. Khun was trying to be a normal idol, to share a relationship with a female and to have a normal relationship with his memb