Hi z92
This is very different from most of the problems we get on here from people your age!
You are only 16 ~ so yes it is young to feel tied, and 9 months is a long time at your age.
Some young people are ready for this kind of thing, especially if they are in love, but you are not one of them.
I think that you need to simply tell her the truth.
You need to tell her that she is a lovely person and you feel very close to her, but that you feel too young to be in a serious, settled, long-term relationship.
It may be hard for her to accept, or she may agree.
Good luck!
