QM, is it possible you could talk more to your friend and T about her experiences moving OUT and getting her own place? Could you maybe room with her while you transition to being on your own. I know where you live you said it was traditional to live with your parents until you marry, but traditional does not equal mandatory. I had very controlling parents who expected us to live at home until married and even moving to a dorm for college was a huge deal. My older sibling lived at home until married, so it was a huge deal for me to refuse to come home one summer. I thought they would actually arrive to drag me home, but they didn't. They screamed and fussed and guilt tripped me, but once the initial storms were over, all I got were periodic sarcastic, derogatory remarks about my lack of family feeling. I could deal with those because I could retreat to my own place after.

Just an idea and just my experience in case it is useful. If not, please feel free to tell me to keep my nose out of it.