[Kevin]

Friendship should be a give/take relationship.

If someone's doing all the giving and the other's doing all the taking, that's not friendship.

Sounds like this girl's behavior has cost her all of her friends and now she's lonely. Hate to sound callous, but she is reaping what she has sewn. I'd send a card about the mother, for old time's sake.

As far as the guilt, if anyone should feel guilt, it's her. She sounds like she may be suffering from some kind of chemical imbalance, maybe she needs psychological help. If you want to be her friend, the best thing for her is a little tough love. Make her go get help.

If you don't want any contact with her, I wouldn't blame you at all. It's her that should feel guilty for the way she's treated you, not the other way around.