If the memory is true, I'm not sure if I deserve to live.
A few weeks ago, a memory from years ago randomly resurfaced. I think it happened around 12th grade when I was 17. I kinda but not entirely might or might not have witnessed one of my classmates doing something very disgusting involving a girl, a significantly younger girl. But here's the thing, I'm not sure who exactly did it, sometimes my mind remembers one classmate but then other times I wonder if it might have been another. And even what they actually did is blurry, my mind is cycling 2 options and both horrify me (though one of them more than the other). I know I was nearby , but I don't rememeber actually seeing it, I just remember the affected girl yelling "Ew!" and then another classmate saying that this other guy had done one of the two things I'm thinking about. .
Yes, what I remember for sure happened is this: one of the two classmates I'm suspecting called for that girl to come to him and I and the others who were with him thought he wanted to prank her. The girl came with one or two friends and then the classmate did...something that I didn't see and the girl yelled "Ew!" and one of her friends called for a teacher to come and we walked away. I don't remember how the affected girl or her friends looked like, or even which one of the two classmates who I'm thinking about might have done it. Nobody who was present reported anything, and I didn't see if a teacher did actually arrive where the girls were. If they did, they didn't report anything either.
I'm not going to say here what the 2 things that I'm thinking one of my classmates might have done were, but if it turns out this isn't a false memory and either of them actually happened...I feel I forfeited my right to live for being a coward who didn't report it. There's also the possibility this is a false memory and the prank that made the girl go "Ew!" was gross but nothing too bad and this is all just me feeding my OCD which for years has been trying to convince me I'm a horrible person who's better off dead. Please help.