Insecure

  1. Deficient in assurance.
  2. Beset by fear and anxiety.
  3. Not highly stable or well-adjusted.
  4. Not confident or sure.
  5. Not adequately guarded or sustained.
  6. Not firmly fastened or fixed.

The emotion of Insecure is found in the Heart meridian in the Fire element.

Definition from Dictionary by Merriam-Webster.