**Prologue:**
This is the story of how I learned my girlfriend cheated on me, possibly several times. It contains a brief description of relevant people included (me, my girlfriend, and her BFF) and some memories before and after we started dating.
I was always into cuckold/cheating porn and several variations. I fantasized a lot about it but never considered I would like it if something similar happened to me. Recently, I learned that my girlfriend cheated on me 6 months after we started dating, and I suspect she still is cheating. After learning about it, I was confused. I got a bit drunk and decided to actively use my porn account on reddit, and post some stories about my girlfriend’s past. I posted some brief memories by changing some aspects (I don’t know why I did this).