Sneaking out and leaving a note?

Hello, I’m 40 and my roomate and landlord I’ve lived with 2 years, she’s 80 and she’s my A.A. sponsor…I desperately want to move out and move on w my life but she’s using the fact I’m a chronic relapser and sobriety to manipulate me when I talk to her about it, or she’ll make me feel guilty for bringing it up and she acts like me and my cat are her “property”…I am isolated and 8 hours from my family; I’m going to move out mid Aug as I’ve found my own place and I’m Afraid to tell her and don’t know how…should I just sneak out and leave a note? Thanks