Помогите с английским языком пожалуйста.when you feel sad and upset because

Помогите с английским языком пожалуйста.

when you feel sad and upset because of a difficult situation you are depressed.

The opposite of optimistic is pessimistic.

when you dont know whats happening or dont know what to do, you feel c _ _ _ _ _ _ _.

when you are looking forward to something you are e _ _ _ _ _ _.

when you are unhappy because you are alone you are l _ _ _ _ _.

If you are not worried scared or angry you feel c _ _ _.