A: It's fine to have a close guy friend as part of your bridal party, and whether they are filling a "bridesmaid" role or even the "maid-of-honor" role, they are typically called an "honor attendant." (It's nice to check with your fiancé first, to be sure he's comfortable with this new tradition.) Adapt the usual list of female-attendant duties to any men in your bridal party. Their main roles will be to support you as you plan the wedding and help you on the day of the event. The one wedding-day duty a male attendant should sit out? Helping you get dressed!
Funny as it was to envision Patrick Dempsey in a dress in the movie "Man of Honor," a male honor attendant wears the same attire as the groomsmen. The only difference might be that his tie match the colors of the bridesmaids' dresses or his boutonniere the bridesmaids' flowers, instead of the groomsmen. And no, he does not carry a bouquet! — Anna Post, The Emily Post Institute