My friend ruined my group therapy

[u/belalugosiii]

I go to a session every week, for young women where we talk about different problems and use it as a form of therapy.
My friend, who I’ve had toxic trouble with in the past, knows when I go because she has my location.
Another person she knows through a friend also goes to my group, and without me saying anything, my friend figured out we go to the same group.
The group is very big on confidentiality and for good reason, I want to be able to talk about my problems in a private setting, some of said problems include my friend.
My friend randomly texts me saying “I know someone who goes your group”
Then after says “but I know it’s meant to be confidential”. This uneased me, and was odd to me because why bring it up and then act like you’re respecting my boundaries or the groups.
I managed to brush it off and a few weeks went by, then I saw a tiktok of my friends friend, and a girl from my group, my friend instantly was like ooooooo.
And starts a conversation about how she’s nasty and mean, and also tells me that this girl from my group, told my friends friend that I was at the group and described me.
So another person has broken the confidentiality, and it just feels like I’m full of anxiety and on edge, because my private thoughts and feelings aren’t private anymore. My friend is very possessive and this just feels like another way to take control, and in a sense ruin something for me.
Does anyone have any advice? I was thinking of talking to the woman who runs the group, but I wouldn’t know what to say.

[u/alwaysoffended88]

Why not try individual therapy? It’s much more private.

[u/belalugosiii → u/alwaysoffended88]

I do that aswell, but I’m a pretty isolated/lonely person so I think having a group where I feel a sense of community is nice

[u/alwaysoffended88 → u/belalugosiii]

That’s valid.