I Have Been Betrayed By Friends

I feel like I've lost all trust for a lady I work with. I had grown close to her and really liked her. She was almost like a second mother to me. I would notice she would stick her nose in other people's business, but you know how women are. I just brushed it off.
Then stuff started to happen to me. She betrayed my trust by telling someone else what I confided to her about. I didn't use names, but it was partially in reference to this lady she decided to tell. So that created a slightly awkward situation. Then she tattled on me for doing something I wasn't technically supposed to do, which I understand, but then months later she asked me a question that was related to the incident that made it feel like she's trying to keep me in line. It's one thing if you see me doing something wrong, but to seek out things I might be doing wrong.. frustrating and very irritating. And there's been other little things that have pushed me away.
I want to get along with her, I really do. But it's tiring listening to her negative comments and gossip that I just don't want to be around. From a Christian standpoint, I see that she needs Jesus. I don't know what to say or do, though. Maybe I should tell her she hurt me, but I'm not good about confrontation.