insecure

adjective2

1. •
   Not secure.

   • The Yung-li ruler, finding Chao-ch’ing insecure, fled to Wu-chou (梧州), Kuangsi province, and then to Kuei-lin, vigorously pursued by the Manchu army. — 1982
2. •
   Not comfortable or confident in oneself or in certain situations.

   • He's a nice guy and all, but seems to be rather insecure around other people.
   • Imagine being so insecure that you make it against the law for folks to dislike you.