Thought truth was supposed set you free.

I told my best friend the truth. I know it needed to be said. This was about her partner whose cheating. She tried blame other girl. The girl knows married but he lying her too. I I told her so.I told her not defending the girl but not everything said was a lie. He lying to both of them. The oh she won't divorce me trick. When he one that won't. I told her he was very much at fault. That she deserve better. I feel he will continue lie about it. When she tried make excuse or defend him ,I cut her off. I been there for her heard cried seen her tears wiped them. She upset with me . I did tell her l love her sorry if I hurt her . I don't know what to do. If telling truth set you free then why do I feel bad???