sorry to advise.

Since it is apparant that the parents are forbidding her from seeing you and that she is now uncomfortable being with you, you should cherish the time you two shared and walk away.

Even if you could patch things up with her parents, things would never be the same between you and her. She now is second guessing your actions and motives. That 'spark' and innocent total friendship will most likey be gone. She obviously is paying attention to her mother so you are fighting a losing battle.

Sorry this happened to you and I know how this hurts. The one thing about little girls and boys is that this will heal quickly and she will soon enough find some other boy or older person in her life. You will need to do the same. You will just torture youself trying to make things work.