Most Helpful Guy
So this is a trust issue. do you believe your boyfriend or her? I would say if he getting mad by you accusing him of cheating is not a good sign. Just because someone swears on him and his daughter life doesn't mean anything. At the end of the day you can't do anything but decided who to believe.
Most Helpful Girl
most likely the girl saying the truth and the boy is lying. but ask her stuff about him