Help me need goid advice girl or guy?

There is this guy I have been talking to and my best friend massaged him she ask be first and she told him she was my bff and he was like text me and she did and he tyed to sleep with her but she wouldn't let him come over and he was talking a lot of crap to he and every thing he was saying she fwd every thing said to her well I didn't say any thing to him about it and then this girl posted on his page and I said something to him about it and he said it wasnhis cousin well my bestfriend asked he and she said no that she had seen him last night and andshe asked him and he said he didn't even know who she was well her and the girl talked and she showed he the massages and he triped on my friend telling her he would get her for harrasnment and she told hi. I didn't know but I do and he don't know that I do I wanna tell him but I wanna do it ot his face should I stop talking to him or I i keep talkingshit to him l