<human>: I have been with my girlfriend for almost a year.

We were cleaning the house today, trying to be productive, and I was sorting through some of the books in our room. I was putting away filled notebooks in drawers (we both write a lot) and was opening them to see if they had writing in them. I honestly wasn't trying to snoop; I know it sounds like I was, but I truly had no idea that one of the notebooks was her personal journal. I wouldn't have flipped through it the way I did, but I saw my friend's name and some sexual stuff, and despite my better judgement I read some of it.

The gist of it is that my girlfriend has been fantasizing about my friend, masturbating to the thought of him, etc. She did write that she would never act on these feelings, which is good I suppose, but the detail she went into was really weird. She didn't say anything bad about me, but the fact that she wasn't describing me in a sexual light instead definitely freaked me out. Apparently she had a dream about him one night.

She refers to her feelings for him as a "harmless crush".

What should I do? Do I bring it up with her? Am I allowed to be as upset as I feel? I feel angry. This was about an hour ago and I feel sick. Help!

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: My girlfriend wrote in her journal about some sexual fantasies she has been having about my friend, I accidentally read one of them, not sure what to do about it