How about something about hidden emotions for someone? Something they can't express because they're scared everyone will threat them differently.

there was an old writing exercise I used to employ with my students in this situation, simply write about anything that is currently on your mind and what I mean by that is what you are thinking at this very moment; I've had students fill up a page after page with writing like this: "I can't think about anything to write, this is so stressful, why can't I think of anything to put down on the page; i'm not timed or anything so why am I worried. I feel stressed, I wonder about this that or the other thing, I wonder whats for dinner tonight, maybe I can write about that or my dog, I love my dog..." etc etc... I called this technique "Conversing with myself" try it and see if you hit a topic that inspires you to write a poem. Hope it helps.

Why not write about how you can't think of anything to write? ^^

ty all