i did not go through the same things, but at 17 i would tell my parents "im going to mikes(or sarahs, or jarrets, or cassies, etc) ill be back in a day or two" and theyd just tell me to be safe and have fun. i think my experience is much closer to typical than what you described, and youre definitely not just being a moody teenager. try to go to college or trade school in a different city so your grandparents dont have the ability to exert so much control over you. try to save every penny you can now, so moving out will be easier later. if you are making $300/wk it should be theoretically possible to have a little spending cash, and have close to $10k by the time you graduate high school, which is more than enough to cover moving costs and first/last months rent, etc. best of luck