My finance's best man has been his best friend since High School; they are inseparable at times and are very close. The three of us have spent a lot of time with each other throughout the years and the best man is generally included in many of our plans. Since the best man has not dated anyone seriously for many years now, he jokes that my finance and I are his significant others. However he wants to change into a wedding dress during his speach as a joke that it's his wedding too. I feel a little put off by the idea that the attention will 1. be on him for crossdressing and 2.that he is symbolically trying to replace me! I need advice: am I being too sensitive on this and let it happen, or should I be putting my foot down??