AITA moving

I (f28) been living with my roomate (f55) for the last 5 years. Backstory: shes a family friend and I broke up with my bf of 10 years and she also broke up with her bf of 6 years and we thought it would be a great idea to save money if we just became roomates and split all the bills in half .She goes to concerts and goes out to the bar, travels and is living her best life thats amazing. I love that for her.But im to the point in life where im working 40 hours and going to school and i have a bf of 3 years now. I just want to relax,work,study and go out every once in a blue moon. I had my fun and now its crunch time. Whenever i go home shes either throwing a party or the house is trashed from the night before.Even the days she knows im studying for a test she has everyone over and my room is next to the dinning room table where everyone hangs out at. Shes expects me to clean the mess because its my yard and my home too even though i stay in my room studying all night. Last week i got home and the cat was outside and the burners to the stove were on for 5 hours and all she said was sorry she left in a hurry.I let the cat in and she started screaming at the top of her lungs that the cat sprayed in the house and thats why she left him out there and now she cant go out because the cats in the house and her night is ruined. The other night I cooked rosemary steak, mashed potatoes ,cheesy broccoli for work and put it in a container but when i woke up it was gone she said she didnt know what happend to it even though i found it in the trash, container and all. My bf offered me to move in with him . He signs his lease again oct 1st . Every time i try to tell her shes either drunk or angry about something. Would i be wrong to text her in a nonproblimatic way about me wanting to take the next step in my relationship and move in with my bf? Im just nervous shes going to get angry if i say it face to face. I dont want to do it through text but its never the right time with her.*boundaries were set the moment we decided to move in together.