Wow, thank you so much for the confidence guys and to answer some questions 1) no she does not have experience “parenting” any 16 year old girls she just basis me off how she was at my age she was very advanced (not so much in a positive way). 2) I am preparing for the worst I’m setting up an emergency bag just in case I was told to just leave 3) it’s inter that you brought up sending a letter because I was considering just leaving and then telling her afterwards but I sort of decided against it as I thought maybe that would be immature even though it would be easiest in some aspects. 4) I would have to wait till Fall2019 to move into a dorm as that is when I will be transferred to a university and dorm eligible

Kasey,
You are showing a lot of courage and maturity in a very difficult situation.
Whether you decide to tell her in person that you are leaving or write a letter, you need to be prepared to act as soon as she knows you are moving out. I am afraid that the odds are very small that your sister will react positively to an adult discussion.

That you have already packed an emergency bag shows that you are already starting to get prepared. I will second the advice of other commentators. Get together important documents such as your birth certificate and social security card. When your sister and brother-in-law are out, you can also pack other items such as clothes and sentimental items from your father. Your BF can bring his car to help you transport your things, and you can store them at your BF’s apartment.

Here is one more thing that none of the other commentators have mentioned. It sounds like your sister is monitoring your texts and email, making it difficult to communicate with your BF. Since you still have a little money of your own, buying a disposable phone that she cannot monitor will help you facilitate your escape plan. The opportunity to move your things may come at short notice, and you need to be able to contact your BF.

Good luck.

I will consult with an estate lawyer when I have gotten out of this situation. Originally I wanted to talk to her about being able to regain control over my life whilst living under her roof. However, upon reading everyone’s advice I have thought about reconsidering this. If I were to move out ASAP I would have to move in with my boyfriend- which she has already made clear that “she knows where he lives” and that she’s appalled at that idea of me ruining my life and would reach out to my mom and never let me come back for help if I needed it. According to her I wouldend up getting pregnant, dropping out of college and having to do “something strange for a piece of change”. Which is not the case I’m very responsible and safe. I’ve tried to contemplate all the solutions I could take that would promote the least amount of drama possible.

She made me quit my job because she thought I was being influenced and wanted to keep an eye on me so she has me work for her 3days a week for 4 hours if I want a job. I currently pay for college through my financial aid and my scholarship. I was able to save for the future previously when I had my own job but now I’m living off my savings to pay for gas(car expenses), schoolbooks (and other school needs that are not covered by aid), and my phone bill.

Also, there might be resources you’re not aware of that you could use through your school – ex. emergency loans, summer housing for students who can’t go home, or even just someone to talk to and help you work through all the shit your sister is laying on you. Now is the time to take help from your community if you need it – it’s there for people in your exact situation.