Hi, August.
I understand that you are lost and very upset, but don't make hasty decisions now.
A lot of good advices above. I bet they have Internet in Baltimore too - why to cut your primary source of support now?
I agree here with Scott - it's ENTIRELY UP TO YOU - not your immediate family, or anyone else, whether you are going to be sober or not.
Life is unfair apriori - accept this fact ASAP and move forward. Fight for you live and sobriety. Fight for getting professional help - counseling, rehab, whatever. Fear won't dissolve by itself - I believe we all are walking through this, sometimes it's damn scary but what else can we do but make the first step in faith and walk. And, you know, it turns out to be not that bad once you walk through fog of fear and despair.
Don't stop posting. Make a plan. There's no magic pill or silver bullet for sobriety - the same old plan and support. Support and plan. Plan and support.
Take care. Don't give up.