Answer:
I crushed on Wendy Darling.
You write on me and secrets I can keep. In places never seen. I spin like a top. Though stiff as a board I'm often described like a mop.
I am a protector. I sit on a bridge. One person can see right through me, while others wonder what I hide. What am I?
I start with T end with T and within me is T.
I am a shimmering field that reaches far. Yet I have no tracks and am crossed without paths.
When is it bad luck to see a black cat?