Am I Wrong... She left... Help?

So my friend has been cheating on his girl for a while now. My girl found out about it and she asked me if I knew... I told her yes I knew. She looked at me and then just started leaving. She won't answer my text or calls or nothing. I was trying to stay out of his mess but I guess I was suppose to tell the girl on my mate? I don't know
So am I wrong?

Am I Wrong... She left... Help?
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