Facebook masochism. Torturing yourself by obsessively monitoring the page of someone you like, but who doesn't like you. This may also include visiting pages of their friends, family and co-wokers. F&M differs from stalking in that any information gained; seeing what they do, where they go, what's new, etc. only makes you more miserable because you aren't a part of it; yet you can't stop looking.
It's his fault I'm into F&M. He shouldn't have told me he liked me, slept with me and then never called me.