I find it odd that you need ask your parents but not your grandma . As I totally understand if you had to ask her as you are living with her.

Do you pay rent? Did you buy the car or is your mom letting you borrow hers ? Unfortunately if the car title is in her name she can technically take the car even if you bought it or paying for it as it is in her name . At least in my state .

I do agree if you don’t like the rules to find a different place to live . I also agree I don’t think it’s a good idea moving in with your boyfriend as your very young . I personally think you if anything you should move into a one bedroom or studio instead of moving in with boyfriend. Your parents will always worry about you no matter how old you get or responsible you are.

Are you able to get a job? I agree with the things @brandnewangel said.

You need to have your own money. That will give you complete freedom. Then you can do whatever the heck you want to do. Never have to answer to anyone. You are an adult now.

i have a job doesn't pay the best but im looking for a better one i tell them im 18 and i should be able to make my decisions but they just get mad and scream that under there roof or under my gradmas roof i have to listen to them i try to ask her for permission but she tells me i have to ask them because she doesn't wanna be in charge of me all of this is just causing me a lot of stress and my mental health is getting bad i just feel trapped here now because they wont let me leave anywhere.
i dont pay rent the car was gifted to me but the title has my moms name so i know she would take it away she told me she would if i try to leave

Keep working at your job. Try to get a second job. Dog walking, baby sitting, etc.

Save every penny. Save up for a used car, that will be all in your name. Unfortunately, if you are tied financially to your Mom or Grandma, then they will continue to tell you what to do in your life.

What does your boyfriend say about all of this? Does he live by himself?

he supports me with whatever i wanna do he hates to see me this way that's why he wants me to move in with him he has told me he would sit with me and talk to my parents to fix or find a solution he lives with his mom and 2 siblings im very close with all of them

It's a difficult situation you are in. You can either *try* to get along with your Mom for now, so that she lets up a little bit. Or, keep saving your money to move out and buy your own used car.

I'm sorry you are dealing with this. Things will get better. Keep working, keep saving your money. Money will give you a lot more freedom in life.

would you 2 be getting your own place or living with his family ? I’m not trying to be a Debbie Downer but if your planning on moving with his family, you might be just creating another problem.

You see yourself as a fully functioning adult who should be allowed to do what she wants. Your parents and grandmother see you as someone who is not a fully functioning adult living on her own, paying her own bills, not dependent on anyone. I am going to give perspective for you to think about, you can decide I am totally wrong but please try to see the bigger picture of what adulthood really is. Moving in with the boyfriend would be exchanging the current dependency for another dependency. It would be the same dependency if you are not paying rent there or responsible for anything. If you and BF make a plan and get an apartment together and you become financially responsible for yourself, this is different from moving in with his mom. I am going to tell you something hard to hear: Get another job, get a second job, work a lot and save up your money and purchase your own car, pay all your bills on your own dime, and move into your own apartment where you are not dependent on anyone. This will be then fully functioning adult. This will then be where you get to make your own decisions. Your parents may be worried about you and not knowing where you are and the crime statistics in your area. Your parents might worry about drugs and alcohol and stuff like that - I don't know you and I just mention this as it is common. Your parents may be overly controlling but they are paying for a lot of your privileges and my guess is that they may feel resentment towards you for not following their rules but expecting things not yet earned. This may not be realistic of either of party. The car was not gifted to you to have forever as it has your mom's name on it. The car was a privilege for you to use as long as your parents want it that way. Sometimes these things are actually cages. You can moan and be mad that you are not being treated as an adult but truthfully, you gotta get to where you act like an adult to earn this. Real life for most adults has no freebies. Your parents may be mean spirited and controlling but it is true that the person who pays has the control. You do have choices to change how your life is. Good luck to you. I wish you the best.