Update:
One of her good friends (The guy that was trying to guess who it was when we were drunk insistently) learnt this. He was really surprised, but I know he won't tell her since he's a mutual friend.
Yesterday, I uploaded funny pictures of people, including this guy on a fake instagram account I had made in the name of another friend of mine from the class, after her best friends request, as a conversation including her was going on in the WhatsApp group. He told me jokingly that he was threating me and I had one minute to remove the picture. I responded in the same joking manner "Sorry sir, immediately!". Her best friend told me not to, but I said that I was being blackmailed and then removed all the pictures and that was it.
Apparently after that, she asked the guy whose picture I had uploaded
"What trump card do you have against Coda?"
He told her that it was a secret but she insisted by saying:
"Please tell me, I'm wondering. It will be revealed in the next 7 months before I come and find a chance to use it against him anyway. So please, just tell me what it is..." She literally begged him lol.
Instead of telling her, he sent a screenshot of this conversation to me, telling me that probably someone has been leaking information and asking me what I would like him to tell her. I don't think anyone's told her, but he had a fair point by saing that I shouldn't have given the ring and it would be less apparent that I loved her if I asked her if she wanted to have sex with me lol.
Today, in the morning he showed me the rest of the conversation.
Apparently she insisted a little bit more but he managed to change the subject by telling her that it was between guys, and she didn't text him for 3 months and now she is because she needs something.
I obviously don't believe that she was really trying to learn a secret I might have. She was seeking proof. Not that I didn't know that she has understood before, but it makes me uncomfortable that she is so fixed on this. I'm wondering what she would have done if he told her. I had been fine for a few weeks, as my friends told me that the possibility of reciprocation was not low at all, but her behaviour, or rather her phrasing, especially the "It will be revealed anyway" part and the fact that she is not just ignoring this whole deal and me makes me panic.
What do I do now? I want to risk everything a bit further by being more active in the WP group, but the next time she gets another impression of me loving her, it'll probably be the breaking point and she'll want to speak with me, since she thinks it'll be revealed before she comes back. Please consider that I have two more years I'll be classmates with her friends, with whom I'm much closer this year and probably her, and I don't want to have to transfer to another school or lose half of my friends.
I think I'll try to distract myself with the school orchestra and bridge this year.