Aw that sucks, man. My friend went through the exact same situation a year and a half ago. He ended up holding his tongue and kinda dealing with the chaotic state in the household until after he turned sixteen, and then he became emancipated. There's a lot of stuff you gotta do though (not to stress you out, cuz right now I'm stressed to the brink and wouldn't wish that on anybody). But, yeah you gotta prove that you would be able to support yourself if you want to be emancipated, and sometimes that means dropping out of high school and getting a job; you also have to prove that the living situation within your home is not creating a mentally productive and physically healthy environment. Didn't you post pictures of your girlfriend a while ago? --Are you guys still together, 'cause just having someone close to you that you can talk to helps.
*holds his breath in hopeful anticipation that you are still with her, and he didnt bring up a sore subject*
~Brandon