No, not that kind of “lost” (knock on wood).

But, don't you hate it when you're walking along talking to someone, it's crowded, you hear a muffled scream but think nothing of it, only to realize several blocks down the street that your friend is no longer walking beside you? You've been talking to a homeless person for the past ten minutes without realizing it?

That's never happened to me, but I did notice my Facebook “friend” count is down by one. I don't recall unfriending anyone, so they must have unfriended me. Can't really blame them, I guess. People can only take so much…