I read something in my girlfriends journal and had to confront her about it. I was shocked.
Sounds serious. What'd it say?
I read that she wished to cut my penis off.
Reading her journal without her permission is wrong, but so is what she wrote in it. You should talk to her about it if what she wrote bothers you.
I'm going to break up with her, if that is what she wants.
I'd say break up with her even if that isn't what she wants. She wrote about cutting your penis off, that's awful.