One of my bridesmaids is being really distant towards me and the bridal party the last few weeks. She hasn't responded to any message from me about the wedding, but will reply about other topics, she hasn't been involved with planning with the other maids either. She even lied to me and said she and my MoH have been doing a lot of planning, but my MoH said she hadn't even heard from her. A couple of weeks later when I asked her and her boyfriend to meet me and my fiance for dinner and she blew me off less than an hour before meeting, saying she didn't feel well. Her boyfriend came to dinner and when I asked if she was okay he said she was fine, that she was getting her nails done with his mom. If her behavior doesn't change soon, I'm thinking of kicking her out of the bridal party, but I'm not sure how to go about it. What is the correct way to do that without losing a friend?