Does anyone have advice for emancipation in the state of Mississippi?

I am 16 years old and will be 17 in April of this year. Since the age of 12 I was taken into DHS custody (social services) and was a foster child up until September of 2009. Through out my teenage years I was placed in many foster homes and group homes. Suddenly I was placed into the current home I am living in now. But I was forced into adoption. My options were to be taken out of this home and be placed in a group home until I graduated high school in May of 2011 or become adopted. So what much of a choice did I have? This family does not treat me fairly and I feel as if I moved in to become their slave. They have two children of their own and you could definitely see how I am treated differently if you were around to see it.I have many adult recommendations stating that emancipation would certainly be in my best interest. They put me through much emotional abuse and do not respect who I am and where I come from. I feel unwanted. I want emancipation! Not just because of freedom, but to create my own stability. Something I have never had in my life. I need help! Please. Any advice would be greatly appreciated. Thanks.