Bfs ex

I keep having dreams with my boyfriends ex, the first one he left me for her, they were messaging on fb and I saw so i kicked him out and he left without hesitation, the second I went to her house and we talked about things. I don’t know why I was opening up to her about my relationship but I was and I told her she was always coming up in fights. Then she said she would be reacting if she wasn’t already talking to someone. Like what is wrong with my mind :)