My "best friend" is a liar!

Okay so one day my best friend decided to plant the idea into my head that I would look cute with this guy, so naturally I began to really really like him because she kept forcing the idea onto me. Only to find out that she did that to escape her own feelings of him. I also found out through good friends that she was having sex with him the whole time I liked him but she didn't tell me and continued to plant the idea into my head further. When I told her I was over him she got into a relationship with him a week later. We used to message everyday and since being in a relationship with him she doesn't message me at all, not that I really want to talk to her anyway. But what do I do about this situation? Like she's ignoring me and then I want to confront her but I can't and I don't really want to be friends with her anymore because of what she did to me but I'm just very lost.