I can't accept that you're not really who I thought you were. You're intelligent enough to plan ahead. Maybe you purposefully had a link to that github page on your chrome app with your known email because you had a thought of doing this eventually. Maybe that's just a friend, a boyfriend, someone you code/collaborate with. The picture on the facebook with the person holding their hand to the screen, missing someone, it's the same one you posted. Maybe he just shared it with you. Yes, there's an SFSU email, so he goes there.
Don't let me spend the rest of my life searching for someone, never being sure whether they've ever existed.