Have you ever been so mean to someone, but it felt soooo right?!?!?!?

A girl I was friends with/date a little, was playing crazy games. I recently found out that she was sleeping with a married man (who is falling in love with her and she is not) and has been with at least 15-20 guys in the last 2 years, a few of whom were drug dealers. I did NOT know this, any of this. Before I told her, she still would play like she is miss innocent. I called her out, completely, I pretty much told her that she should not play games with me and that I think she is a ho* and slu* for breaking up a home and being so promiscuous. She told me I was childish and "should crawl into a hole and die"....I told her she is worthless and VERY insecure among other things, AND IT FELT SOOOOO GOOOD!!! It felt like I got a monkey off my back, and part of me felt bad that maybe she needs some serious help.