Some more information would help. Why does she resent you, and is this a recent development or more of a long term issue? Or did it develop as she progressed in dementia?
Your profile states your caring for someone, as well as at a nursing home. This would be your sister?
Do you have any legal responsibility for her? If so, perhaps that's why she resent you.
But more information on her condition and yours as well as the dynamics between the two of you would be helpful.
She resents your independence while she feels quite captive. Patients often direct their anger at the very people who care for them most. It's not your fault, but you might ask about antidepressants for her so she can accept things better.
Your profile states your caring for someone, as well as at a nursing home. This would be your sister?
Do you have any legal responsibility for her? If so, perhaps that's why she resent you.
But more information on her condition and yours as well as the dynamics between the two of you would be helpful.