Would you leave your partner if they told people about your fetish?

My gf told her friends and her sister about my fetish. She knows i'm really insecure about it. But she did it anyway. I don't think i can properly process how betrayed i feel. Now i'm wondering if I should leave her.

I can maybe understand telling your sister, but she did'nt have to tell her friends, especially because I want that info to be PRIVATE!

Should i stay or should i go?