He's not my friend, actually. We were casual friends through the link of his girlfriend last year, but we had never spent time together alone. Regardless, he didn't want the diary, even when I offered to scan the pages in so that neither of us had to waste gas to get it to him.
I have a feeling that I'm going to be hearing from his girlfriend soon, though. "Oh my God! You promised to never tell! You ruined my life!"