So last month my boyfriend and I broke up , and he recently just told me that his best friends girlfriend which was one of my closest friends I thought sent him nudes and tried to have sex with him . She still doesn't know I know but she try's to be my friend and pretends to be my friend still and she recently just texted me saying her and her bf are having problems now and I haven't replied bc I honestly don't give a crap . Should I reply and confront her or should I just keep it to myself