Shine, I am very sorry to hear about your situation
I know there was and mybe still an ASA who was/is on GC who did the same thing!
I talked to her in hopes that I could give a little better perspective, but she Did disaffiliate anyway.!
We had a Brother at my Chapter Who did the same thing and would not talk to me or our advisor about it. I had become quite close as an Alum to him!
Sometimes it does happen!