I am happy = I am a happy person
I am confused = I am a confused person.
1 (of a person) unable to think clearly; bewildered: she was utterly confused about what had happened.
• showing bewilderment: a confused expression crossed her face.
• not in possession of all one's mental faculties, especially because of old age: interviewing confused old people does take longer.
2 lacking order and so difficult to understand: the confused information supplied by authorities | reports about the incident were rather confused.