Just because a person is extroverted with the opposite sex, and/or tends to be immature in their views of other cultures...doesn't mean they are having sex outside of their 'relationship'. And even if this person is a 'jerk' this doesn't also mean they are stupid.

I wouldn't want to be with a person who didn't want to be with me...and I most certainly wouldn't want to be with a person who would condemn me simply because of something I may be thinking. We can't make people be good...and we can't make people be happy...and we most certainly can't tell people to love us, or what to think.