Fear of sobriety is usually just fear of the unknown. Six weeks ago, I was terrified. (You can see my old frightened threads!) Trust me, once you get into sobriety, you'll find life is much better than it was before.
Instead of thinking of what you lose (booze. yay. it's sooooo awesome.), think of what you'll gain. All the new energy and health you'll have. The free time you can use for new interests. The money you'll have! The new sober friends who have their lives together! You'll feel better and the person in the mirror will look better every day.
It's normal to be afraid where you are right now, but don't let the fear stop you. Take our word for it, life after booze is so, so much better!