I’m mean and I hate myself

It’s awful, I hate it and I hate myself. I’ve posted on here before about my mom moving in over a year ago and being diagnosed with Lewy body dementia. Countless falls, delusions, hallucinations, etc and I’m in a deep depression. Every time I’m with her, I feel my personality change. I don’t want to talk and can’t be my normal self and I don’t know why. She pointed it out to me tonight. She said I’m so sweet to everyone else and so angry at her and she’s right. It’s not me, it’s not how I usually am. I’m like a different person around her. I do feel angry and resentful. She constantly is asking what’s on my mind and I why I’m so angry and I just don’t know. If it weren’t for my kids I think I’d end my life. I know that’s awful but it’s true. I moved a year ago and have no friends anymore. I exercise and end up crying while I’m running. I hate being like this but I don’t know how to change. I’m on meds too and nothing helps.