Is AUTHOR wrong in the post ? POST : Note: on mobile so sorry if there are any format problems

So this happened not even an hour ago. I was alone in the car with a friend/coworker who has as a part of her job to drive me and a bunch of other people back and forth to a hotell and the place where we work, as there are too many assigned to the same tasks.

I have told myself to be as honest as possible with all of my friends whenever I can be so I took this opportunity to tell her what some of the others co-workers have said behind her back.

She got visibly upset about it and the silence during the duration of the trip was deafening. I had only attempted to clear my conscience (not denying this for one second) and to be honest with her.

Aita for telling her about what some people have said behind her back whilst I was simply trying to be honest with her? I have a gnawing sensation that I fd up when doing it and simply got a feeling of guilt. I did apologize to her but she said that I shouldn't have apologized.

Tl;dr: was truthful with a friend and felt bad about it afterwards