>_>
Similar things have happened to me.
I was kind enough to lend my friend my Invader Zim boxset, and she lent it to her friends, and I haven't seen it for like..two years D:
Then my Azumanga Daioh also got taken by a friend even though I lent it to someone else.. And I'm worried, because apparently she doesn't take care of her DVDs and I paid a pretty penny for my Azumanga Daioh and don't want to have to buy it again.. ;__;