Emancipation in Texas is called "removal of disabilities".
You are no longer a minor child so your "disabilities" of being a child have been removed & you are now an adult in the eyes of the State of Texas.
It is described in the Texas Family Code which is available for free on-line.
You MUST meet every qualification for a judge to sign the legal documents to have you declared an adult.
So if you are 14 - you cannot qualify & the judge cannot legally sign the paperwork.
Even if your parents agree that you should be declared an adult.
It's illegal and a judge cannot sign illegal paperwork.
You must support yourself -- so your boyfriend, adult, friend, etc. cannot support you.
You must fulfill every qualification - if you cannot meet one qualification - then it MUST be denied by the Judge. There is no latitude in this regulation. It is a law passed by the Texas Legislature.