Aysha,
If there is anyone in your family to Marchmann Act you, the court will mandate rehab and put you there. You will not be able to leave while in rehab. I had to do it for my son. He did exceptionally well in rehab, but relapsed while in the 1/2 way house. He said he was not ready then, but is now putting himself into rehab. Hang in there.
In the mean time, maybe you could speak with a sponser, counselor, therapist, priest, rabbi, etc. Call a local NA or AA meeting. If you don't have a ride, see if someone can pick you up. Good luck and God bless.