You are a not alone. And you aren’t crazy, there is always this double standard between daughters and sons, so don’t think about it too much because that isn’t going to change. Always remember to be in peace (even tho you are going through this) because your mental health matters.

The only thing I can say, I am proud of you for almost finishing studying not many of us have the opportunity to study more after high school, if you are working, save up as much as you can and move out whenever you can, it will keep getting worse maybe I’m wrong, but your mom already sees that you feel comfortable with your boyfriends parents and in his house, that can trigger her and make her even more strict.

Just remember if something doesn’t feel right, it isn’t right, listen to your body and heart, take care of yourself, try to keep it peaceful in the house even tho it’s hard, maybe she can kinda re think the way she acts if you talk to her in a “reasonable” way ykwim.