I fucked up majorly and cheated on her during a very rough patch we were having. Decided I didn't want her to have to deal with that, so I bit the bullet and used the rough patch as an excuse to break up.
She found out through my retard friend anyway and it did exactly what I thought it would, which was completely fuck up her ability to form healthy relationships with men. She's now an active part of her city's BDSM scene and can't hold a relationship, and I'm happily engaged to the latina girl I cheated on her with.
The bad people in that situation won. I don't know what that says about the world.