If there is a danger of her accidently overdosing on meds, having an accident, she does need help. Firstly, contact your doctor for a medical assessment, then perhaps take her on a visit to a nursing home? to see for herself what it is like, and explain that her safety is your concern. I did this with hubby so that I could arrange respite, and it made it a bit easier for him to accept, and he loved the attention of the carers!!

I would advise you do it sooner rather than later for her safety. My mother was living alone and ended up in hospital after an OD. The hospital doctors would only discharge her to a place where she would be safe as she remains at risk of self-neglect, self-harm, suicide and falls. Could your doctor or another health professional help you? Are they able to do an assessment to add weight to your argument?
(My mother is much happier in a residential home where she has fantastic care and 24-hour company. Not all care homes are sad, grim placed - some are filled with laughter!)

I just tell my mom that I live with her for me... I thank her for letting us move in with her. This way she feels like she is the hero and not a burden

I sincerely hope all goes well for you all. x

Loved ones often think of assisted living as being fobbed off by the family. So instead of being the bad guy, get your doctor involved more, and get him to explain in more detail. Also arrange a visit to the home you may have in mind. If it's to her liking, it will be a done deal.