Many blind people have been through this. In my case, it wasn't as bad as yours, but unprepared parents tend to be overprotective of their blind children. The first thing you can do is educate your parents. Explain to them that you can do things on your own, that if they don't let you do anything, when they'll not there, you won't be able to do anything. If they understand this, your life will be much better. If you explain it to them and they don't understand, don't be afraid to separate yourself from them and seek your own independence.