Honesty doesn't worth it in friendship often times
i have a friend who had a crush on a girl, and told me many times about it. And i also have a different friend who after a few years married that girl and even invited me to the wedding. I ofcourse didn't tell my first friend that i was on a wedding with the girl he loved. It would be "honest", but what is there to gain from that honesty? The guy who married that girl is also a big jerk, so it would be especially painfull for him to learn that his youth love married that jerk and that i was there to see them kiss in the wedding costumes.