<human>: I posted about this about two months ago, as I found out my friend Matt was cheating on his girlfriend Anna* and he said he was planning on breaking up with her. I decided to let it go because I believed he would end it as soon as possible. 

Fast forward about six weeks and he's still stringing this poor girl along, while sleeping with someone else behind her back. Im not friends with Anna at all, we've never spoken, and I don't know any of her friends. But it's gut wrenching seeing this still happen. 

I've had numerous arguments/conversations with Matt about what is going on. He said he doesn't even like Anna anymore, but it's apparently hard to end a relationship with someone you don't even like? 

I am seriously about to message Anna right now and tell her everything, because I would hate this happening to me. But I don't know how to go about it, or if it's really my place. At this point I'm so angry at Matt that I couldn't care less about our friendship because of his disgusting attitude to all of this.

Give me the gist of the text in a nutshell
<bot>: Should I tell this girl that her boyfriend is cheating on her/planning to break up/doesn't even like her anymore