That's a tough one. I, honestly, have never had any problems with someone bringing a close friend as a date, especially if it's someone that won't know very many people at the wedding. But I also know that a lot of couples get really annoyed when people do this. I would ask the bride what she thinks. I would much rather have someone bring a close friend and enjoy themselves than for them to sit alone all night. It really kind of depends on the situation, but I think the best thing would be to ask her.