What legal action can I take to go live with my birthmother?

i am 16 years old and was adopted when i was 2. I found my birth-mother when i was 14 and have had contact ever since. i really want to go live with her but my parents wont let me…, i want to live with her because yes i am very grateful that they took care of me when she couldnt but i have been raised to be different than what and who want to be. they live in the country side and my birth-mom lives in a city not a big city but a city. what legal action can i take to go live with my birth-mother