I have a close friend who is essentially like a sister. For the past year and a half she has been dating a married man. He keeps telling her he's going to file for divorce, then it doesn't happen. I love my friend dearly, but do not approve of her relationship.
She's one of my bridesmaids and I've reached the point where I needed the counts for the reception hall. When I talked to her on the phone she asked me if I would be comfortable with her bringing her "boyfriend". I gave the honest answer that if he was still married, I'd prefer if she not bring him. She was pretty upset and wasn't able to talk after that. I told her that I always love her even if I don't always agree with the decisions she makes. She said she felt the same way and that since it's my wedding its my choice.
Even though I feel I made the right decision, I also feel horrible because she's one of my best friends and I hate making her upset.