Help, please

I'm really offended and sad due to a Girl I'm friends with claiming she's a child of God but constantly interacts in se*ual activities twice or once a week. She told me it's her life she will do what she wants but it's hurting me knowing she's saying she is catholic yet she commits adultery twice a week 😥😭 like she can't say she's it if she does this every week it's not fair please what do I do I'm so sad and angry too