DEAR HARRIETTE: My guy friend knew that I was getting cheated on but didn’t say anything to me about it. He never liked my ex-boyfriend. He warned me a few times that the man that I was with was not a good person, but he never gave me a specific reason as to why he felt that way, so I brushed it off. When I found out that I was being cheated on, my friend’s first response was, “I tried to tell you.”