Bridesmaids and groomsmen don't have to know each other very well. Of course, it would be better if you were familiar with it. It doesn't matter if you are not familiar with it. Because their role is only to represent the man and the woman respectively and act as a foil at the wedding. There is less communication with each other, not so much, not so much. So, you and your lover don't have to worry about this. Finally, I wish you a happy marriage!