I was caught backstabbing my friend? (10 pts for best answer)?

Okay so she convinced me to give her my password for facebook so I did. I was on hers too. All was good. I told her not to look at my convos with other people and she did. I even deleted my message inbox. But so basically some of my friends think she's annoying because she is popular and is different from them. Sometimes she spams me for fun, so I had a convo with my friend about how she was annoying and at the same time my friends were chatting her while she was on. And while she was on, she was defending me by commenting back on what someone said to me. I was appreciative till she took credit and like basically inavaded my privacy. What should I do?