I have relationship problems!?

So...I don't exactly know where to start. �My ex bff started hanging around the most petty girl I've ever met around October. �Don't get me wrong...I honestly wanted to be friends with this girl at first so us three started hanging out, then these two guys they were both "talking to" started filling in their weekends and I came along one day (this was terribly awkward when I found out that I was not only the fifth wheel but a cover up, like ALWAYS). �So, before you comment on how judgmental I'm being hear me out, while hanging out with her (for days) and my ex bff I put all the rumors and bad things I heard about her aside and I honestly wanted to be friends with her but I found how distustingly two faced she can be with people to the point where it is almost inhuman. �Instead of having a decent conversation or evening with her, you hear her constantly talking about a guy she likes and how his soon to be girlfriend is apparently ugly to her since she is going to be with him, then you hear her a couple minutes later talking about how physically ugly someone is and that she doesn't like them not even as a friend because of their appearance, then she talks crap about some of the nicest people I know (who dont bother wasting time putting people down) even though she doesn't even know them (she just rides their bus). �You know, it got me over the edge when I heard my "bff" drag me into the bathroom when she was laughing about what this girl had said. �She said, "OMG! You know what Sarah just told me? �Haha...she was pointing to abby and said look at the acne on her chest!". This truly then and there was a turning point in my life, �I was disgusted. �You know, this girl Sarah (not my ex-bff) truly disgusts me on how she fools everybody I know kissing up to their faces and hugging them to keep up a good rep with them then bashes them like this in the most disgusting manner. �Why on earth should I even put up with people like this? �Now my old bff acts exactly like her now.