To not be a claimed as a dependent, you must provide more than half your own support; or not live with your parents more than half the nights of the year; or both.
For support, you can't "feel" it, you need to prove it with math. You can use worksheet 2 here. https://www.irs.gov/pub/irs-pdf/p501.pdf
For living with your parents, they can consider you to live with them if you are temporarily absent, and school is usually considered a temporary absence if it is reasonable for them to expect you to return home when school is over (on breaks, summer, etc.) If you move out and really establish an independent living place, then you aren't temporarily absent from your parents home any more. But there is no black letter rule on this, it depends on each person's facts and circumstances.
