How does a 17 year old in South Carolina emancipate herself?

This is not easy, to free yourself from your parents home is difficult. You should really consider other options before this. Family counseling, even separate counseling. Talk to a trusted adult or relative. You must have good reasons for wanting this and only a judge can determine this if your still a minor. Consider that once you do this you will change the dynamics of your family forever and there is no turning back. Be sure the reasons you want to be emancipated are the truth because you can get into a lot of trouble for lying and make lots of problems for family members, whether they are involved or not. Go to your local library and get books on improving you and your families relationship, you only have one lineage and it is important.