Hi Lilith! I'm Isaac, a new English tutor on Italki. It could mean "She identified me to our friends." but there are multiple definitions depending on the context. If you would like clearer answer, maybe you could give me more context such as the sentences before and/or after that one. I hope I was able to help :)

to tell other people someone's intimate details.

It means she disclosed something that is personal to you without your consent.

It means that she revealed something about me. Most likely something that I didn't want people to know about me.