Bo Yan's apology was sincere. He felt that as a man, who had been Xia Siyu's boyfriend and was now her husband, it was true that gender equality was emphasized nowadays, but in a relationship, he'd been passive, while Xia Siyu had been the active one. She was more enthusiastic, and he was less responsive; indeed, he was at fault too.
Although he still didn't understand why Xia Siyu suggested breaking up immediately after their first time together. He didn't even get the chance to make amends before she disappeared from his world.
But no matter what, the fact that he made his wife—also his former girlfriend—feel both angry and lonely meant that the problem lay with him. Or perhaps, the problem had always been there, and he was just too oblivious to notice it sooner.