OMG, I could have written something very close to your post.
There is person at my HG that I have given rides to that fits your description. She is disabled and can't drive though. I have gone to pick her up for a meeting and she has had a man at her house whom I did not know, (feels unsafe) and then decided she didn't want to go to the meeting after I sat there for 15 minutes.
She has called me asking me to loan her money, buy her cigarettes, etc.
I have told her each time no. My sponsor said I should cut the cord. She still calls and have answered over the past few days. Pretty much, I can honestly tell you that she only calls when she wants something. It is never to check on me or say hello.
I have issues with setting boundaries with moochers liker her. I am getting to the point where I am just going to ignore her calls though.
She will bad mouth me at the HG, I know though.
I have no advice, I just wanted to commiserate.