why wont my let me have facebook?

[Stella]

Just because Facebook says you're old enough, your parents know you best and they probably don't think you're mature enough or responsible enough to be on the Internet.

Your parents care about you and are afraid that you may post some inappropriate things. I am linking an article about allowing kids on the Internet. Read it with your parents. There are a list of "rules". Your family can decide what rules to follow and what really isn't necessary in your situation. Maybe with some rules in place, your parents will feel better about allowing you on Facebook, with their strict supervision.