Reddit, yesterday I made a connection between two childhood memories and now I feel horribly guilty. Anyone else have a similar experience to share?

This goes back to my junior year of HS. I hooked up with a girl right before school started, and then she made it pretty clear that she wanted a relationship. I thought she was pretty cool, so I didn't have a problem with that.

The first memory was the next week, after a football game (she wore my jersey), she was having a bonfire and I was getting drunk with my buddies, so I told her I would stop by. We drove and met our friend who bought us alcohol, and as we were about to drive out there one of our other friends called and said that it was lame and nobody was drinking out there. We ended up going back to town and getting drunk. She sent me about ten texts asking where I was, and I didn't read them. When I read them in the morning, most of them were terrified messages saying that one of her ex's was out at her house and was pissed and she was scared he was going to kick her ass. I had figured we would get together sometime in the next few days, but it obviously didn't happen.

The second memory was around six months later. I was sitting in school when an announcement came over the loudspeaker telling us to remain in our classrooms until we were told to leave. The school didn't want to tell us why, but as we were a tiny school, eventually word got out. It turns out three girls, one of which was the girl from memory #1, had all been raped by the same guy. In retaliation, they had decided to rip the lock off of his locker and destroy all of his stuff, and when confronted they were inconsolable.

Anyways, I was thinking about this girl the other day and how we drifted apart and suddenly I remembered: that night that I had ditched her at her bonfire, when I hadn't shown up to protect her, someone else stepped up. That guy would take advantage of her emotionally for months following, and would become her rapist. Fuck me, I feel like shit after realizing that.

TL;DR - Ditched a girl, thus setting her up with her rapist.