I know someone like that (without the perverted part) I tried every way I could to help her but it was never enough. Every day the same story multiple times a day as if I'd have some sort of an epiphany as how to solve her problems if she JUST KEPT BEATING ME OVER THE HEAD with it! I just quit answering the damn phone! I mean for months and months the story never changed! Before I stopped answering, I found myself starting to obsessively complain about how annoying, ungrateful & needy she was becoming. She wasn't even TRYING to help herself other than to get everyone around her to do things FOR HER. And that wasn't helping her at all. It was taking what little energy I had left to be around her & that left me empty with nothing left to give to anyone. If this is happening to you (being emotionally drained by her) you may need to save yourself & walk away, or at least take some time off for awhile. Give her some time to find "a new song to sing". Other than that, I'm not sure what might help.