Boundary busting mother.

I've been helping my 78 year old mother for ten years since my father had died. I moved her into my house at the age of 30 because she didn't have anywhere to go and there the problems started. She has been diagnosed with an early set of dementia, and has problems with diabetes and has also had a minor stroke. My mother is a very controlling and jealous person specifically with me. She has tried to set curfews on me, control who I see, and loves to throw guilt at me constantly. I am working on setting boundaries with her but sometimes she seems to be a professional boundary buster; set one boundary and she breaks another until I'm exhausted.

I have recently gotten into a new relationship and this has elevated things to a more difficult problem. Her attitude and and sometimes vicious personality have already ruined three potential partners for me and I don't want history to repeat itself. She makes it extremely difficult to spend time with my new partner and the verbal and emotional abuse gets unbearable at times.

I am currently seeking help with a psychologist, and am also taking two antidepressants to help me cope with her. I don't have help from my siblings because the two that said that they would help what they could are far away with no financial means to assist me. The other three who are nearby do not want anything to do with her and refuse to be a part of her or my life.

I am trying to get through all of this but I really am afraid that the same thing that has happened in the past is going to repeat itself and I don't want to re-live that again.

Thanks for your time.