As far as being afraid
I think that you know what you need to do and it is scary. Trust me I was 13 or 14 the first time I went to any kind of detox and it was a different experience (I'm 27 now); being away from my family as a kid was kind of hard.
It is the best thing depending on how addicted you are. I really can't even tell you and no one else here can. If you can detox yourself with out heavy withdrawls, than I wish I was you. Especially if your not really used to withdrawl symptoms; it will shock you.