User blog:CykeP/I need some unbiased advice

So I've got a friend who I recently found out has not only gone to talk bad about me behind my back to my best friend, but to people I've just gotten to know and potential friendships and things, for reasons unknown. This is someone who I've looked up to for a while before I found out that she's not that great a person.

And I'm not just saying that; she's had a hard life, but because of that she's become really bitter and acts very immaturely (and she's got about five years on me in age). I'm not sure why, but she's got something against me. I've always had to play the bigger person when we have had our disagreements, and I liked to think things were okay after a while.

However, it's apparent that things aren't. She keeps talking about me behind my back and thinks I don't know, while playing nice with me when I go to her to try and have a conversation. She has a little group of friends who enjoy talking bad about everyone, and apparently I'm a subject that comes up a lot.

I wanted to ask my friends about this that know her, but I don't want to start anything or have them start to dislike her etc. etc. So my question is, what would you do if you found out someone was talking badly about you? At the very least, what do you think I should do about it?

I'd like to stay friends with her, but she's made it fairly clear she's not as fond of the idea as I am x'D

That aside, I hope you're all having a great day. And thanks for your help!