✔ 最佳答案
How many times you be a 伴娘 was not the main issue. I think you can talk to your 表姐 first and see if she wants a 伴娘. If she really wants one, you can explain to her your concern. If she tells you she really wants you, I think you can still do it. Remember, can get marry or not doesn't depends on how many times you be a 伴娘. It's not something which can affect you a lot.
On the other hand, recently, many people are preferring not to have 伴娘 as it's not easy to choose one and it's still be fun to have all the girls to be your help instead of having one to be the 伴娘. So everyone can share the workload and not have to have the same one standing besides the bride. Hope it could help you.