nervous
A condition of fear that causes one to be tense, awkward, jittery, and apprehensive, possibly with trembling or excitability, often caused by being uncertain of what dangers may be looming or how to handle them.
For example, teenagers regularly feel nervous when they don't know what an attractive person of the opposite sex thinks of them.
For example, teenagers regularly feel nervous when they don't know what an attractive person of the opposite sex thinks of them.