As a couple people have said, you got off easy. Just cut them loose from your life.
I have a friend who loaned one of his co-worker "friends" $1000.00 because the guy told him
a sob story about how tough his life was, trying to make ends meet, etc, etc.
That was six years ago. Since then, the 'friend' was awarded $25,000 in an insurance settlement.
He gave my buddy $200.00 of the $1000.00 he owed him. He said that was all he could do at the time
because he had so many bills. He was, however, able to buy a pool table and a giant flat screen TV.