Why wrong: When the same person or thing is the performer and the receiver of the action in the same verb, a reflexive pronoun is used. There are several of them: myself, yourself, himself, herself, oneself, itself, ourselves, yourselves and themselves. They should agree in person (first, second or third) and number (singular or plural) with the subject. For more information, click here.
Correct it: Are you proud of yourself?
Contact Roy. You’ll feel much more proud of yourself as your English improves.