I'm sorry that this is happening to you. Confidentiality is suppose to make the group a safe place for one to open up and share their hurt and pain. Also, it's nobodies business as to who is there.
I for one can't see any good of group therapy for treating this condition. There are too many variables to be considered per client and this is such a personable condition that strikes at the very core of an individual's person.
Are you in a mental hospital? We did group therapy as a general must do thing twice a day. Being with other patients of varying conditions can be harsh...it all depends on the crowd. I hope that things eases up and gets better for you.

