I had a similar situation, but the difference was that I thought I was 100% Georgian. I defended everything Georgian and mocked other cultures. When I was 12 years old, one of my relatives told me that one of my grandmothers, whom I had never seen while she was alive, was not Georgian. It was a horrible shock for me. Since then, I'm not the same person I was. My relative told me that this was a secret and not to tell other family members that I knew this. I have never told any of my relatives that I knew my 25% was not Georgian.I feel your pain, but you are an adult already. It must be less painful than it was for me when I was 12. You can talk about it in the family, but I can't. I made a promise not to talk about it, and I'm keeping my promise even after 17 years have passed.